WIP: Status message on user profile

What does this MR do?

Allow users to set a status message to be displayed on their profile and next to their name on notes.

Are there points in the code the reviewer needs to double check?

Why was this MR needed?

Users want to be able to let others know what their current status is without being obtrusive to the current workflow. This is especially helpful for letting others know that you are currently out of the office.

Screenshots (if relevant)

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• API support added
• Tests added for this feature/bug
• Add user's current status to the interface
  • note author of a merge request
  • todos dashboard
  • project_members name on /project_members
  • snippet author name (on index and show)
  • commit author name (on index and show)
  • event author name in lists
  • note author of an issues
  • assignee's name on MR and issue lists
  • assignee's name in the sidebar of an MR and Issue
• Added to features.yml
• Review
  • Has been reviewed by UX
  • Has been reviewed by Frontend
  • Has been reviewed by Backend
  • Has been reviewed by Database
• Conform by the merge request performance guides
• Conform by the style guides
• Squashed related commits together
• Internationalization required/considered
• End-to-end tests pass (package-and-qa manual pipeline job)

What are the relevant issue numbers?

Closes #35463 (closed)