add status/status_emoji fields to user, validation, strong parameters, and include on the profile

What does this MR do?

Allow users to set a status message and emoji to be displayed on their user profile.

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

Why was this MR needed?

A user may want the ability to let other users know will be unavailable for a period of time by setting a status. A current workaround is updating the user name field.

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
• 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-qa manual pipeline job)

What are the relevant issue numbers?

#35463 (closed)