feat: allow all sts options for roles assumed by the cli

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

@@ -231,6 +231,11 @@ export async function cloneDirectory(source: string, target: string, output?: No
 }
 
 interface CommonCdkBootstrapCommandOptions {
+  /**
+   * @default - the default CDK bootstrap template.
+   */
+  readonly bootstrapTemplate?: string;
+
   readonly toolkitStackName: string;
 
   /**
@@ -420,6 +425,9 @@ export class TestFixture extends ShellHelper {
     if (options.usePreviousParameters === false) {
       args.push('--no-previous-parameters');
     }
+    if (options.bootstrapTemplate) {
+      args.push('--template', options.bootstrapTemplate);
+    }
 
     return this.cdk(args, {
       ...options.cliOptions,
@@ -620,7 +628,7 @@ export async function installNpmPackages(fixture: TestFixture, packages: Record<
   }, undefined, 2), { encoding: 'utf-8' });
 
   // Now install that `package.json` using NPM7
-  await fixture.shell(['node', require.resolve('npm'), 'install']);
+  await fixture.shell(['node', '/Users/sumughan/Developer/aws-cdk/packages/@aws-cdk-testing/cli-integ/lib/package-sources/repo-tools/npm', 'install']);
 }
 
 const ALREADY_BOOTSTRAPPED_IN_THIS_RUN = new Set();