( AWS::ApiGateway::Stage ) False-positive drift results caused by resource-level tags not being recognised

[greg5123334]

Name of the resource

AWS::ApiGateway::Stage

Resource Name

No response

Issue Description

Cloudformation is not seeing tags added to AWS::ApiGateway::Stage resources, resulting in false-positive drift results.

Expected Behavior

Upon deploying the test stack, drift detection should report all resources IN_SYNC.

Observed Behavior

AWS::ApiGateway::Stage is immediately reported as drifted for a freshly-deployed stack.

Expected:

{
  "DeploymentId": "g38abc",
  "RestApiId": "dg3jabckj0dk",
  "StageName": "stageA",
  "Tags": [
    {
      "Key": "Name",
      "Value": "Liquid"
    },
    {
      "Key": "Note",
      "Value": "If-you-see-this-its-working"
    }
  ]
}

Actual:

{
  "DeploymentId": "g38abc",
  "RestApiId": "dg3jabckj0dk",
  "StageName": "stageA"
}

Test Cases

1. Deploy stack

       api = apigateway.SpecRestApi(self, "ExampleRestApi",
                                    api_definition=apigateway.ApiDefinition.from_asset(
                                        "assets\petstore_api_definition.json"),
                                    )
       # https://docs.aws.amazon.com/apigateway/latest/developerguide/api-gateway-create-api-from-example.html
   
       CfnOutput(self, 'ApiGatewayNameOutput',
                 value=api.rest_api_name,
                 description='API Gataway Name',
                 )
       CfnOutput(self, 'ApiGatewayIdOutput',
                 value=api.rest_api_id,
                 description='API Gataway Id',
                 )
   
       deployment = apigateway.Deployment(self, 'Deployment',
                                          api=api,
                                          )
       api_stage = apigateway.Stage(self, 'Stage',
                                    deployment=deployment, stage_name='stageA',
                                    )
       api.deployment_stage = api_stage
   
       CfnOutput(self, 'ApiGatewayStageOutput',
                 value=api_stage.stage_name,
                 description='API Gataway Stage name',
                 )
       CfnOutput(self, 'ApiGatewayStageArnOutput',
                 value=api_stage.stage_arn,
                 description='API Gataway Stage Arn',
                 )
   
       Tags.of(api_stage).add("Name", "Liquid")
       Tags.of(api_stage).add("Note", "If-you-see-this-its-working")

2. Detect Drift

3. View Drift results

AWS::ApiGateway::Stage will be drifted.

Other Details

Sample API definition

Please note: Hard-coded to eu-west-1 region. petstore_api_definition.json

[greg5123334]

Similar to #1296