Resolve "Including a link to the posted comment for visual review app review feature"

What does this MR do?

This MR adds a link to the Visual Review feedback form that points back to the originating MR. It must be merged alongside gitlab-ee!14172.

See it in action: https://review-app-test.sarahghp.now.sh/

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation created/updated or follow-up review issue created
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

Closes #63247 (closed)