What does this MR do?
Add sort runners by last contacted on admin runners.
Are there points in the code the reviewer needs to double check?
Why was this MR needed?
Admins want to clean up inactive ones from dozens of the registered runners. For that, sort runners by 'Last contacted' on admin runners would be helpful.
Screenshots (if relevant)
Does this MR meet the acceptance criteria?
Changelog entry added, if necessary
- [n/a] Documentation created/updated
- [n/a] API support added
Tests added for this feature/bug
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
What are the relevant issue numbers?