command for moving an issue at note box

What does this MR do?

Add ability to move issue to another repository using slash command, from the note textarea.

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

Yes

Why was this MR needed?

A feature request

Screenshots (if relevant)

Does this MR meet the acceptance criteria?

• Changelog entry added
• Documentation created/updated
• API support added
• Tests
  • Added for this feature/bug
  • All builds are passing
• Conform by the merge request performance guides
• Conform by the style guides
• Branch has no merge conflicts with master (if it does - rebase it please)
• Squashed related commits together

What are the relevant issue numbers?

Closes #26925 (closed)