Introduce build minutes

Merged Kamil Trzcińśki requested to merge introduce-build-minutes into master

What does this MR do?

It introduces build minutes for Shared Runners.


  • The build minutes are accounted per-namespace,
  • You can overwrite amount of given build minutes per-namespace,
  • You configure global amount of build minutes that namespace can spend,
  • The amount of used build minutes is cleared out with separate cron job,
  • It uses a separate table to store amount of build minutes spend.

The build minutes are updated after every build. It can't be done as per-pipeline event due to fact that builds from pipeline can be retried.

Are there points in the code the reviewer needs to double check?

Why was this MR needed?

Screenshots (if relevant)

Does this MR meet the acceptance criteria?

What are the relevant issue numbers?

Closes #1405 (closed)