Admin should be able to turn shared runners into specific ones:
## What does this MR do?
Make sure admins could turn shared runners into specific runners.
## Are there points in the code the reviewer needs to double check?
Is this the desired behaviour?
## Why was this MR needed?
Closes#19039Closes#19272

See merge request !4961
(cherry picked from commit b569f842b3)
Make it possible to lock runner on a specific project
Make it possible to lock runner on a specific project.

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Closes#3407
See merge request !4093