Make AnyCable patches compatible with Action Cable testing

[palkan]

What is the purpose of this pull request?

Make AnyCable compatible with Action Cable testing. That's only need when we want to run system tests with AnyCable. Otherwise using test adapter works fine.

What changes did you make? (overview)

Added patches to testing stub modules.

Is there anything you'd like reviewers to focus on?

Checklist

• [x] I've added tests for this change
• [x] I've added a Changelog entry