Apply new GitLab UI for buttons in 2fa and changed deprecated info to confirm

What does this MR do?

This is a follow up MR that only rewords some commits so the danger job can pass, this community contribution has been approved by UX and FE already in !52580 (merged)

Screenshots (strongly suggested)

Please see !52580 (merged)

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• [-] Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• [-] Database guides
• [-] Separation of EE specific content