feat(dynamodb): enable contributor insights for global secondary index (

#30560)

### Issue # (if applicable)

Closes #15671 .

### Reason for this change
To enable contributor insights for a specific global secondary index.

This feature is supported in [CFn](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-dynamodb-table-globalsecondaryindex.html#cfn-dynamodb-contributorinsightsspecification-enabled).



### Description of changes
Add `contributorInsightsEnabled` property to the `GlobalSecondaryIndexProps` in `Table`.

In  [AWS::DynamoDB::GlobalTable GlobalSecondaryIndex](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-dynamodb-globaltable-globalsecondaryindex.html),  `ContributorInsightsSpecification` does not exist.

So I didn't change `TableV2`.



### Description of how you validated changes
Add unit test and integ tests.



### 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*

packages/@aws-cdk-testing/framework-integ/test/aws-dynamodb/test/integ.dynamodb.contirubtor-insights-for-gsi.js.snapshot/aws-cdk-dynamodb-contributor-insights-for-gsi.template.json

@@ -0,0 +1,105 @@
+{
+ "Resources": {
+  "TableWithGlobalSecondaryIndexCC8E841E": {
+   "Type": "AWS::DynamoDB::Table",
+   "Properties": {
+    "AttributeDefinitions": [
+     {
+      "AttributeName": "hashKey",
+      "AttributeType": "S"
+     },
+     {
+      "AttributeName": "gsiHashKey",
+      "AttributeType": "S"
+     }
+    ],
+    "GlobalSecondaryIndexes": [
+     {
+      "ContributorInsightsSpecification": {
+       "Enabled": true
+      },
+      "IndexName": "GSI-ContributorInsightsEnabled",
+      "KeySchema": [
+       {
+        "AttributeName": "gsiHashKey",
+        "KeyType": "HASH"
+       }
+      ],
+      "Projection": {
+       "ProjectionType": "ALL"
+      },
+      "ProvisionedThroughput": {
+       "ReadCapacityUnits": 5,
+       "WriteCapacityUnits": 5
+      }
+     },
+     {
+      "ContributorInsightsSpecification": {
+       "Enabled": false
+      },
+      "IndexName": "GSI-ContributorInsightsDisabled",
+      "KeySchema": [
+       {
+        "AttributeName": "gsiHashKey",
+        "KeyType": "HASH"
+       }
+      ],
+      "Projection": {
+       "ProjectionType": "ALL"
+      },
+      "ProvisionedThroughput": {
+       "ReadCapacityUnits": 5,
+       "WriteCapacityUnits": 5
+      }
+     }
+    ],
+    "KeySchema": [
+     {
+      "AttributeName": "hashKey",
+      "KeyType": "HASH"
+     }
+    ],
+    "ProvisionedThroughput": {
+     "ReadCapacityUnits": 5,
+     "WriteCapacityUnits": 5
+    }
+   },
+   "UpdateReplacePolicy": "Delete",
+   "DeletionPolicy": "Delete"
+  }
+ },
+ "Parameters": {
+  "BootstrapVersion": {
+   "Type": "AWS::SSM::Parameter::Value<String>",
+   "Default": "/cdk-bootstrap/hnb659fds/version",
+   "Description": "Version of the CDK Bootstrap resources in this environment, automatically retrieved from SSM Parameter Store. [cdk:skip]"
+  }
+ },
+ "Rules": {
+  "CheckBootstrapVersion": {
+   "Assertions": [
+    {
+     "Assert": {
+      "Fn::Not": [
+       {
+        "Fn::Contains": [
+         [
+          "1",
+          "2",
+          "3",
+          "4",
+          "5"
+         ],
+         {
+          "Ref": "BootstrapVersion"
+         }
+        ]
+       }
+      ]
+     },
+     "AssertDescription": "CDK bootstrap stack version 6 required. Please run 'cdk bootstrap' with a recent version of the CDK CLI."
+    }
+   ]
+  }
+ }
+}