Fix FIDO U2F for Opera browser (based on !10118)

What does this MR do?

Enable U2F support for Opera browser

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

No

Why was this MR needed?

Opera supports U2F (it's based on Chromium) but Gitlab thinks it doesn't.

Does this MR meet the acceptance criteria?

• Changelog entry 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?

No issues.

Based on merge request: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/10118