Support restoring project/group runners like instance runners

This is probably a little ways off and not a super top priority, but at some point there will be project level runners. Whether its runner using a specific image or we simply dont want it running in other projects. Need a way when migrating gitlab to restore the same functionality across all projects that use project level runners.

First brainstorm is

• Use single snippet for project ids and number, token maybe retrieved via api?
• Maybe single snippet of ids, each project keeps private snippet and of num/token
  • This requires finding the snippet per project