Fix Ctrl+Enter keyboard shortcut saving comment/note edit

What does this MR do?

• Fix Ctrl+Enter keyboard shortcut saving comment/note edit
• Remove duplicated .js-quick-submit behavior applying in the new comment textarea

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

Why was this MR needed?

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Tests added for this feature/bug
• Review
  • Has been reviewed by Frontend
• Conform by the merge request performance guides
• Conform by the style guides
• Squashed related commits together
• Internationalization required/considered

What are the relevant issue numbers?

Closes #41956 (closed)