Add alternative archive route

What does this MR do?

The current archive route returns an archive named project-ref-sha and a parent directory of the same name. When packaging releases of projects hosted on GitLab, this makes the process more difficult because both the tag and sha must be known.

Adding a route that returns an archive project-ref simplifies packaging.

• Verify gitlab-workhorse version upgraded. Added in 3.7.0
• Add new route
• Handle shortname <project>-<ref>
• Update interface

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
• 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
• End-to-end tests pass (package-qa manual pipeline job)

What are the relevant issue numbers?

Closes #38830 (closed)