fix(apigateway): set authorization scope when authorization type is Cognito (#30035)

### Issue # (if applicable)

Closes #29781

### Reason for this change

Authorization scope is set even when the auth type is None. This will cause deployment failure 
>12:52:11 PM | CREATE_FAILED | AWS::ApiGateway::Method | ActionsApiGatewayI...oxyOPTIONS041B022A
Resource handler returned message: "Invalid Method authorization type specified. Authorization Scopes are only valid for COGNITO_USER_POOLS authorization type (Servic
e: ApiGateway, Status Code: 400, Request ID: f9c6357b-428e-42a8-884c-07b77939d165)" (RequestToken: bb8de2e9-37b7-ca15-9bd8-547bc7eea134, HandlerErrorCode: InvalidRequ
est)

### Description of changes

Check when auth type is not Cognito, set auth scope to none. Not a breaking change because original templates cannot deploy.

### Description of how you validated changes

All existing and new tests pass.

### Checklist
- [ ] 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: GavinZZ

packages/@aws-cdk-testing/framework-integ/test/aws-apigateway/test/authorizers/assets/index.py

@@ -0,0 +1,8 @@
+import json
+
+def handler(event, context):
+    print("Event: ", event)
+    return {
+        'statusCode': 200,
+        'body': json.dumps({'message': 'Hello from Lambda l2!'})
+    }