More descriptive error when clocks between Geo nodes are out of sync

What does this MR do?

In case there is a large difference between the system clocks of different Geo nodes (> 60 seconds) the JWToken won't be valid. Make this error more descriptive so sysadmins can identify the problem.

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

The language in the error message.

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
• Review
  • [-] Has been reviewed by UX
  • [-] Has been reviewed by Frontend
  • Has been reviewed by Backend
  • [-] Has been reviewed by Database
• Conform by the merge request performance guides
• Conform by the style guides
• Squashed related commits together
• Internationalization required/considered
• If paid feature, have we considered GitLab.com plan and how it works for groups and is there a design for promoting it to users who aren't on the correct plan

What are the relevant issue numbers?

Closes gitlab-org/gitlab-ee#4276