chore: enforce eol-last rule (#32335)

### Reason for this change

This rule was previously not enforced and implementation inconsistent.
Enforcing a new line at the end of the file makes it easier to append
files.

### Description of changes

**No code changes! Only formatting.** 💅🏻 

And a bit of config:

- Added a new eslint rule for `eol-last`
- Added a VSCode seting to automatically insert newlines
- Applied the rule to all non-compliant files

Best reviewed with whitespace changes ignored:
https://github.com/aws/aws-cdk/pull/32335/files?w=1

### Description of how you validated changes

No code changes, purely formatting.

### Checklist
- [x] My code adheres to the [CONTRIBUTING
GUIDE](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md) and
[DESIGN
GUIDELINES](https://github.com/aws/aws-cdk/blob/main/docs/DESIGN_GUIDELINES.md)

----

*By submitting this pull request, I confirm that my contribution is made
under the terms of the Apache-2.0 license*

aws-cdk.code-workspace

@@ -1,6 +1,7 @@
 {
   "folders": [{ "path": "." }],
   "settings": {
+    "files.insertFinalNewline": true,
     "jest.jestCommandLine": "node_modules/.bin/jest",
     "jest.autoRun": "off",
     "jest.virtualFolders": [

packages/@aws-cdk-testing/cli-integ/bin/test-root.ts

@@ -1,3 +1,3 @@
 import * as path from 'path';
 // eslint-disable-next-line no-console
-console.log(path.resolve(__dirname, '..'));
+console.log(path.resolve(__dirname, '..'));

packages/@aws-cdk-testing/cli-integ/lib/eventually.ts

@@ -39,4 +39,4 @@ const eventually = async <T>(call: () => Promise<T>, options?: EventuallyOptions
   throw new Error('An unexpected error has occurred.');
 };
 
-export default eventually;
+export default eventually;

packages/@aws-cdk-testing/cli-integ/lib/github.ts

@@ -40,4 +40,4 @@ export async function fetchPreviousVersion(token: string, options?: {
   if (previousMVRelease) { return previousMVRelease; }
 
   throw new Error(`Unable to find previous version given ${JSON.stringify(options)}`);
-};
+};

packages/@aws-cdk-testing/cli-integ/lib/index.ts

@@ -10,4 +10,4 @@ export * from './with-aws';
 export * from './with-cdk-app';
 export * from './with-packages';
 export * from './with-temporary-directory';
-export * from './resources';
+export * from './resources';

packages/@aws-cdk-testing/cli-integ/lib/lists.ts

@@ -6,4 +6,4 @@ export function chunk<A>(n: number, xs: A[]): A[][] {
   }
 
   return ret;
-}
+}

packages/@aws-cdk-testing/cli-integ/lib/memoize.ts

@@ -11,4 +11,4 @@ export function memoize0<A>(fn: () => Promise<A>): () => Promise<A> {
     }
     return promise;
   };
-}
+}

packages/@aws-cdk-testing/cli-integ/lib/package-sources/release-source.ts

@@ -78,4 +78,4 @@ export class ReleasePackageSource implements IPackageSource {
       return `${frameworkVersion}-alpha.0`;
     }
   }
-}
+}

packages/@aws-cdk-testing/cli-integ/lib/package-sources/repo-tools/npm.ts

@@ -45,4 +45,4 @@ child.once('close', code => {
   if (code) {
     process.exitCode = code;
   }
-});
+});

packages/@aws-cdk-testing/cli-integ/lib/package-sources/source.ts

@@ -32,4 +32,4 @@ export interface IPackageSource {
    * Not all tests will respect this.
    */
   requestedAlphaVersion(): string;
-}
+}

packages/@aws-cdk-testing/cli-integ/lib/package-sources/subprocess.ts

@@ -12,4 +12,4 @@ export function packageSourceInSubprocess(): IPackageSource {
     case 'release': return new ReleasePackageSource();
     default: throw new Error(`Unrecognized package source: ${process.env.PACKAGE_SOURCE}`);
   }
-}
+}

packages/@aws-cdk-testing/cli-integ/lib/staging/npm.ts

@@ -59,4 +59,4 @@ async function writeNpmLoginToken(usageDir: UsageDir, endpoint: string, token: s
   return rcFile;
 }
 
-// Environment variable, .npmrc in same directory as package.json or in home dir
+// Environment variable, .npmrc in same directory as package.json or in home dir

packages/@aws-cdk-testing/cli-integ/lib/staging/nuget.ts

@@ -72,4 +72,4 @@ async function writeNuGetConfigFile(filename: string, login: LoginInformation) {
 </configuration>`);
 }
 
-// NuGet.Config in current directory
+// NuGet.Config in current directory

packages/@aws-cdk-testing/cli-integ/lib/staging/parallel-shell.ts

@@ -48,4 +48,4 @@ export async function parallelShell<A>(
   }));
 
   await q.onEmpty();
-}
+}

packages/@aws-cdk-testing/cli-integ/lib/staging/pypi.ts

@@ -47,4 +47,4 @@ export async function uploadPythonPackages(packages: string[], login: LoginInfor
     }
     return 'fail';
   });
-}
+}

packages/@aws-cdk-testing/cli-integ/lib/staging/usage-dir.ts

@@ -96,4 +96,4 @@ export class UsageDir {
     // eslint-disable-next-line no-console
     console.log(`    source ${this.directory}/activate.bash`);
   }
-}
+}

packages/@aws-cdk-testing/cli-integ/lib/with-packages.ts

@@ -12,4 +12,4 @@ export function withPackages<A extends object>(block: (context: A & PackageConte
       packages: packageSourceInSubprocess(),
     });
   };
-}
+}

packages/@aws-cdk-testing/cli-integ/lib/with-timeout.ts

@@ -30,4 +30,4 @@ export function withTimeout<A>(seconds: number, block: (x: A) => Promise<void>)
       timeOut,
     ]);
   };
-}
+}

packages/@aws-cdk-testing/cli-integ/test/resource-pool.test.ts

@@ -84,4 +84,4 @@ function* range(n: number) {
   for (let i = 0; i < n; i++) {
     yield i;
   }
-}
+}

packages/@aws-cdk-testing/cli-integ/test/xpmutex.test.ts

@@ -42,4 +42,4 @@ function waitFor(pred: () => boolean): Promise<void> {
       }
     }, 5);
   });
-}
+}

packages/@aws-cdk-testing/cli-integ/tests/init-python/init-python.integtest.ts

@@ -17,4 +17,4 @@ import { integTest, withTemporaryDirectory, ShellHelper, withPackages } from '..
     await shell.shell([`${venvPath}/bin/pytest`], { modEnv: venv });
     await shell.shell(['cdk', 'synth'], { modEnv: venv });
   })));
-});
+});

packages/@aws-cdk-testing/cli-integ/tests/init-typescript-app/init-typescript-app.integtest.ts

@@ -63,4 +63,4 @@ async function removeDevDependencies(context: TemporaryDirectoryContext) {
   const pj = JSON.parse(await fs.readFile(filename, { encoding: 'utf-8' }));
   delete pj.devDependencies;
   await fs.writeFile(filename, JSON.stringify(pj, undefined, 2), { encoding: 'utf-8' });
-}
+}

packages/@aws-cdk-testing/cli-integ/tests/init-typescript-lib/init-typescript-lib.integtest.ts

@@ -10,4 +10,4 @@ integTest('typescript init lib', withTemporaryDirectory(withPackages(async (cont
   await shell.shell(['npm', 'ls']); // this will fail if we have unmet peer dependencies
   await shell.shell(['npm', 'run', 'build']);
   await shell.shell(['npm', 'run', 'test']);
-})));
+})));

packages/@aws-cdk-testing/framework-integ/test/aws-apigateway/test/integ.cors.handler/index.ts

@@ -8,4 +8,4 @@ exports.handler = async (evt: any) => {
       'Access-Control-Allow-Origin': '*',
     },
   };
-};
+};

packages/@aws-cdk-testing/framework-integ/test/aws-apigateway/test/integ.restapi-default-apikey.ts

@@ -29,4 +29,4 @@ new integ.IntegTest(app, 'LambdaTest', {
   testCases: [stack],
 });
 
-app.synth();
+app.synth();

packages/@aws-cdk-testing/framework-integ/test/aws-apigateway/test/integ.spec-restapi.import-deploymentstage.ts

@@ -71,4 +71,4 @@ new integ.IntegTest(app, 'specrestapi-import-deployment-stage', {
   testCases: [stack],
 });
 
-app.synth();
+app.synth();

packages/@aws-cdk-testing/framework-integ/test/aws-apigateway/test/integ.spec-restapi.ts

@@ -92,4 +92,4 @@ const app = new cdk.App();
 const testCase = new Test(app, 'test-apigateway-spec-restapi');
 new IntegTest(app, 'apigateway-spec-restapi', {
   testCases: [testCase],
-});
+});

packages/@aws-cdk-testing/framework-integ/test/aws-apigateway/test/integ.stepfunctions-startexecution-without-default-method-responses.ts

@@ -41,4 +41,4 @@ new IntegTest(app, 'aws-apigateway-stepfunctions-startexecution-without-default-
   ],
 });
 
-app.synth();
+app.synth();

packages/@aws-cdk-testing/framework-integ/test/aws-apigateway/test/integ.stepfunctions-startexecution.ts

@@ -48,4 +48,4 @@ new IntegTest(app, 'aws-apigateway-stepfunctions-startexecution', {
   ],
 });
 
-app.synth();
+app.synth();

packages/@aws-cdk-testing/framework-integ/test/aws-apigatewayv2-authorizers/test/auth-handler/index.ts

@@ -6,4 +6,4 @@ export const handler = async (event: AWSLambda.APIGatewayProxyEventV2) => {
   return {
     isAuthorized: key === '123',
   };
-};
+};

packages/@aws-cdk-testing/framework-integ/test/aws-apigatewayv2-authorizers/test/integ.lambda.handler/index.ts

@@ -6,4 +6,4 @@ export const handler = async () => {
       'Content-Type': 'application/json',
     },
   };
-};
+};

packages/@aws-cdk-testing/framework-integ/test/aws-apigatewayv2-authorizers/test/integ.user-pool.handler/index.ts

@@ -20,4 +20,4 @@ export const handler = async (event: any, _context: any = {}): Promise<any> => {
   } else {
     throw new Error('Unauthorized');
   }
-};
+};

packages/@aws-cdk-testing/framework-integ/test/aws-apigatewayv2-integrations/test/http/integ.add-subroute-integration.ts

@@ -110,4 +110,4 @@ integ.assertions.httpApiCall(httpApi.apiEndpoint + '/thirdroute').expect(Expecte
 integ.assertions.httpApiCall(httpApi.apiEndpoint + '/thirdroute/subroute').expect(ExpectedResult.objectLike({
   body: 'success-hit-third-lambda',
   status: 200,
-}));
+}));

packages/@aws-cdk-testing/framework-integ/test/aws-apigatewayv2-integrations/test/http/integ.http-proxy.ts

@@ -33,4 +33,4 @@ function lambdaProxyEndpoint(s: Stack): HttpApi {
   return new HttpApi(s, 'LambdaProxyApi', {
     defaultIntegration: new HttpLambdaIntegration('DefaultIntegration', handler),
   });
-}
+}

packages/@aws-cdk-testing/framework-integ/test/aws-apigatewayv2-integrations/test/http/integ.lambda-proxy.ts

@@ -24,4 +24,4 @@ const endpoint = new HttpApi(stack, 'LambdaProxyApi', {
 
 new CfnOutput(stack, 'Endpoint', {
   value: endpoint.url!,
-});
+});

packages/@aws-cdk-testing/framework-integ/test/aws-apigatewayv2-integrations/test/http/integ.stepfunctions.ts

@@ -53,4 +53,4 @@ httpApi.addRoutes({
 new integ.IntegTest(app, 'stepfunctions-integration-integ-test', {
   testCases: [stack],
 });
-app.synth();
+app.synth();

packages/@aws-cdk-testing/framework-integ/test/aws-apigatewayv2-integrations/test/websocket/integ.lambda-connect-disconnect-trigger.ts

@@ -78,4 +78,4 @@ new WebSocketStage(
 
 new IntegTest(app, 'Integ', { testCases: [stack] });
 
-app.synth();
+app.synth();

packages/@aws-cdk-testing/framework-integ/test/aws-apigatewayv2/test/websocket/integ.api-apikey.ts

@@ -10,4 +10,4 @@ new apigw.WebSocketApi(stack, 'MyWebsocketApi', {
   apiKeySelectionExpression: apigw.WebSocketApiKeySelectionExpression.HEADER_X_API_KEY,
 });
 
-app.synth();
+app.synth();

packages/@aws-cdk-testing/framework-integ/test/aws-appconfig/test/integ.application.ts

@@ -21,4 +21,4 @@ Application.addAgentToEcs(taskDef);
 
 new IntegTest(app, 'appconfig-application', {
   testCases: [stack],
-});
+});

packages/@aws-cdk-testing/framework-integ/test/aws-appconfig/test/integ.configuration.ts

@@ -287,4 +287,4 @@ function generateDummyRole(): iam.Role {
   }));
 
   return role;
-}
+}

packages/@aws-cdk-testing/framework-integ/test/aws-appsync/test/integ.appsync-disable-introspection.ts

@@ -20,4 +20,4 @@ new IntegTest(app, 'api', {
   testCases: [stack],
 });
 
-app.synth();
+app.synth();

packages/@aws-cdk-testing/framework-integ/test/aws-appsync/test/integ.appsync-eventbridge.ts

@@ -27,4 +27,4 @@ new IntegTest(app, 'api', {
   testCases: [stack],
 });
 
-app.synth();
+app.synth();

packages/@aws-cdk-testing/framework-integ/test/aws-appsync/test/integ.appsync-global-api.ts

@@ -20,4 +20,4 @@ new IntegTest(app, 'api', {
   testCases: [stack],
 });
 
-app.synth();
+app.synth();

packages/@aws-cdk-testing/framework-integ/test/aws-appsync/test/integ.appsync-limit-configs.ts

@@ -21,4 +21,4 @@ new IntegTest(app, 'api', {
   testCases: [stack],
 });
 
-app.synth();
+app.synth();

packages/@aws-cdk-testing/framework-integ/test/aws-appsync/test/integ.appsync-merged-api-arn-flag-enabled.ts

@@ -49,4 +49,4 @@ new IntegTest(app, 'api', {
   testCases: [stack],
 });
 
-app.synth();
+app.synth();

packages/@aws-cdk-testing/framework-integ/test/aws-appsync/test/integ.appsync-merged-api.ts

@@ -49,4 +49,4 @@ new IntegTest(app, 'api', {
   testCases: [stack],
 });
 
-app.synth();
+app.synth();

packages/@aws-cdk-testing/framework-integ/test/aws-appsync/test/integ.appsync-none.ts

@@ -19,4 +19,4 @@ new IntegTest(app, 'api', {
   testCases: [stack],
 });
 
-app.synth();
+app.synth();

packages/@aws-cdk-testing/framework-integ/test/aws-appsync/test/integ.appsync-private-api.ts

@@ -20,4 +20,4 @@ new IntegTest(app, 'api', {
   testCases: [stack],
 });
 
-app.synth();
+app.synth();

packages/@aws-cdk-testing/framework-integ/test/aws-appsync/test/integ.appsync-source-api-association.ts

@@ -72,4 +72,4 @@ new IntegTest(app, 'api', {
   testCases: [stack],
 });
 
-app.synth();
+app.synth();

packages/@aws-cdk-testing/framework-integ/test/aws-appsync/test/integ.environment-variables.ts

@@ -18,4 +18,4 @@ api.addEnvironmentVariable('EnvKey2', 'non-empty-2');
 
 new IntegTest(app, 'IntegTestEnvironmentVariables', { testCases: [stack] });
 
-app.synth();
+app.synth();

packages/@aws-cdk-testing/framework-integ/test/aws-autoscaling/test/integ.asg-instance-termination-policy.ts

@@ -55,4 +55,4 @@ function asgHandler(_event: any, _context: any, callback: any) {
   // eslint-disable-next-line quote-props
   const result = { 'InstanceIDs': instanceIds };
   return callback(undefined, result);
-}
+}

packages/@aws-cdk-testing/framework-integ/test/aws-backup/test/integ.backup-selection.ts

@@ -61,4 +61,4 @@ const stack = new TestStack(app, 'cdk-backup-selection');
 
 new IntegTest(app, 'BackupSelectionTest', {
   testCases: [stack],
-});
+});

packages/@aws-cdk-testing/framework-integ/test/aws-certificatemanager/test/integ.certificate-key-algorithm.ts

@@ -47,4 +47,4 @@ new IntegTest(app, 'integ-test', {
   testCases: [stack],
   diffAssets: true,
   enableLookups: true,
-});
+});

packages/@aws-cdk-testing/framework-integ/test/aws-cloudfront-origins/test/integ.rest-api-origin-custom-origin-path.ts

@@ -17,4 +17,4 @@ new cloudfront.Distribution(stack, 'Distribution', {
 
 new IntegTest(app, 'rest-api-origin-custom-origin-path', {
   testCases: [stack],
-});
+});

packages/@aws-cdk-testing/framework-integ/test/aws-cloudfront-origins/test/integ.s3-bucket-origin-default.ts

@@ -36,4 +36,4 @@ integ.assertions.awsApiCall('CloudFront', 'getDistributionConfig', {
       ]),
     },
   }),
-}));
+}));

packages/@aws-cdk-testing/framework-integ/test/aws-cloudfront-origins/test/integ.s3-encrypted-bucket-origin-oac.ts

@@ -36,4 +36,4 @@ const integ = new IntegTest(app, 's3-encrypted-bucket-origin-oac', {
 const call = integ.assertions.httpApiCall(`https://${distribution.distributionDomainName}/test.html`);
 call.expect(ExpectedResult.objectLike({
   body: 'ecb13420-3826-4f11-a1b5-a4ac2f65c7c6',
-}));
+}));

packages/@aws-cdk-testing/framework-integ/test/aws-cloudfront-origins/test/integ.s3-origin-oac.ts

@@ -53,4 +53,4 @@ integ.assertions.awsApiCall('CloudFront', 'getOriginAccessControlConfig', {
     SigningBehavior: 'always',
     OriginAccessControlOriginType: 's3',
   },
-}));
+}));