Defer tooltip update on Resolve Comment button after DOM cycle

What does this MR do?

• Defer updating the Resolve Comment button tooltip until after DOM cycle is complete

Why was this MR needed?

• The tooltip for the Resolve Comment button was not changing when resolving all comments in a discussion even though the button status was updating

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 #25957 (closed)