chore(cognito-identitypool-alpha): add assertions to integ test (#33549)

### Issue # (if applicable)

N/A

### Reason for this change

To put these integration tests more in-line with the rest in the repository and ensure tests are comprehensive, added assertions to validate that the `IdentityPool` construct is deployed with the correct parameters.

### Description of changes

Added assertions against the Cognito calls for `DescribeIdentityPoolCommand` ([doc ref](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/client/cognito-identity/command/DescribeIdentityPoolCommand/)) and `GetIdentityPoolRolesCommand` ([doc ref](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/client/cognito-identity/command/GetIdentityPoolRolesCommand/)).

### Describe any new or updated permissions being added

N/A

### Description of how you validated changes

`yarn integ test/integ.identitypool.js` passes and the tests deploy.

### 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*

Author: Leo10Gama

packages/@aws-cdk/aws-cognito-identitypool-alpha/test/integ.identitypool.js.snapshot/asset.3e61c39c0efebc770b86906206d499dc248b5325972df96455773db9e6a37216.bundle/index.js

@@ -600,6 +600,49 @@
    ]
   }
  },
+ "Outputs": {
+  "ExportsOutputRefidentitypoolE2A6D099E51DBB61": {
+   "Value": {
+    "Ref": "identitypoolE2A6D099"
+   },
+   "Export": {
+    "Name": "integ-idp:ExportsOutputRefidentitypoolE2A6D099E51DBB61"
+   }
+  },
+  "ExportsOutputFnGetAttidentitypoolE2A6D099Name3FFCBBDD": {
+   "Value": {
+    "Fn::GetAtt": [
+     "identitypoolE2A6D099",
+     "Name"
+    ]
+   },
+   "Export": {
+    "Name": "integ-idp:ExportsOutputFnGetAttidentitypoolE2A6D099Name3FFCBBDD"
+   }
+  },
+  "ExportsOutputFnGetAttidentitypoolAuthenticatedRoleB074B49DArnF2BA4F08": {
+   "Value": {
+    "Fn::GetAtt": [
+     "identitypoolAuthenticatedRoleB074B49D",
+     "Arn"
+    ]
+   },
+   "Export": {
+    "Name": "integ-idp:ExportsOutputFnGetAttidentitypoolAuthenticatedRoleB074B49DArnF2BA4F08"
+   }
+  },
+  "ExportsOutputFnGetAttidentitypoolUnauthenticatedRoleE61CAC70Arn1E3CB7FC": {
+   "Value": {
+    "Fn::GetAtt": [
+     "identitypoolUnauthenticatedRoleE61CAC70",
+     "Arn"
+    ]
+   },
+   "Export": {
+    "Name": "integ-idp:ExportsOutputFnGetAttidentitypoolUnauthenticatedRoleE61CAC70Arn1E3CB7FC"
+   }
+  }
+ },
  "Parameters": {
   "BootstrapVersion": {
    "Type": "AWS::SSM::Parameter::Value<String>",