Resolve "Expose GitLab license/plan as a CI/CD variable"

What does this MR do?

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

See corresponding EE MR. I will merge the EE one after this is merged (assuming that's the correct way to do it).

Why was this MR needed?

Screenshots (if relevant)

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• [NA] API support added
• Tests added for this feature/bug
• Review
  • [NA] Has been reviewed by UX
  • [NA] Has been reviewed by Frontend
  • Has been reviewed by Backend
  • [NA] Has been reviewed by Database
• Conform by the merge request performance guides
• Conform by the style guides
• Squashed related commits together
• [NA] Internationalization required/considered
• End-to-end tests pass (package-qa manual pipeline job)

What are the relevant issue numbers?

Closes #40994 (closed)