Fix clicking disabled clipboard button toolip

What does this MR do?

Use anchor instead of button to avoid bootstrap tooltip tripping up on disabled buttons.

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

Why was this MR needed?

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
  • 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 https://gitlab.com/gitlab-org/gitlab-ce/issues/32518

@iamphill want to review?

assigned to @iamphill

assigned to @lbennett

changed milestone to %9.2

added ~149423 frontend regression labels

resolved all discussions

added 1 commit

• be411be7 - Correct fix by reverting to anchor and bluring the disabled button on click

Compare with previous version

added 1 commit

• 255aed3a - Added spec for bluring disabled copy button

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assigned to @iamphill

approved this merge request

merged

mentioned in commit 6b092d96

Picked into 9-2-stable, will go into 9.2.0-rc7.

mentioned in commit af81730b