fix(stepfunctions-tasks): stateMachine construct doesn't generate a valid policy for default StateMachineRole

[xazhao]

Issue # (if applicable)

Closes #31714.

Reason for this change

Currently, the step functions runEcsTask() will create an IAM policy. The Resource section is an ARN constructed by CDK with wildcard * appending at the end. However, CDK should Ref the resource directly instead of constructing the ARN, while keeping the revision number.

Description of changes

The same solution as #31615. However this change needs to behind a feature flag because it could be a breaking change.

Description of how you validated changes

Integration test. Also checked the synth template.

Checklist

• My code adheres to the CONTRIBUTING GUIDE and DESIGN GUIDELINES

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By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license

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Thank you for contributing! Your pull request will be updated from main and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).

[GavinZZ]

LGTM

[aws-cdk-automation]

AWS CodeBuild CI Report

• CodeBuild project: AutoBuildv2Project1C6BFA3F-wQm2hXv2jqQv
• Commit ID: ef49fb3
• Result: SUCCEEDED
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