[#26599] Added clipboard button for note

What does this MR do?

Adds the copy to clipboard button to notes (comments) that links to the page anchor

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

Why was this MR needed?

Feature proposed in https://gitlab.com/gitlab-org/gitlab-ce/issues/26599

Screenshots (if relevant)

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• 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?

https://gitlab.com/gitlab-org/gitlab-ce/issues/26599

Closes #26599 (closed)