Resolve "More RESTful API: include resource URLs in responses"

Make possible to easily specify related resource URI's for each Grape::Entity in our API.

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• Changelog entry added, if necessary
• Documentation created/updated
• API support 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?

Closes #22600 (closed)