[Product Pull Request] fix: allow only enrolled users in course team roles

[jmakowski1123]

Master ticket for this workstream.

Child PRs:

• fix: enroll users when added to a course team role openedx-platform#32561
• fix: enroll users when added to a forum role openedx-platform#32436

[github-actions]

Thanks for your submission, @openedx/open-edx-project-managers will review shortly.

[itsjeyd]

@jmakowski1123 @mphilbrick211 It looks like this is done; the PRs for it have been merged. Can we close this ticket and move it to Shipped on the roadmap?