Move reply to comment tooltip to the top

What does this MR do?

Move the tooltip for "reply to comment" button to the top to align with the other actions.

What are the relevant issue numbers?

fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/59198

Screenshots

Before	After

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated via this MR
• Documentation reviewed by technical writer or follow-up review issue created
• Tests added for this feature/bug
• Tested in all supported browsers
• Conforms to the code review guidelines
• Conforms to the merge request performance guidelines
• Conforms to the style guides
• Conforms to the database guides
• Link to e2e tests MR added if this MR has Requires e2e tests label. See the Test Planning Process.
• Security reports checked/validated by reviewer