Includes: [Refactor click commands after deprecation of click.MultiCommand](https://gitlab.com/BuildGrid/buildgrid/-/merge_requests/1266) [Determine scheduler metrics per-instance](https://gitlab.com/BuildGrid/buildgrid/-/merge_requests/1269)
Includes: [Refactor click commands after deprecation of click.MultiCommand](https://gitlab.com/BuildGrid/buildgrid/-/merge_requests/1266) [Determine scheduler metrics per-instance](https://gitlab.com/BuildGrid/buildgrid/-/merge_requests/1269)