Rapid Action -- Improve GCS Monitoring
Part of https://gitlab.com/groups/gitlab-org/-/epics/6361#exit-criteria.
This is something I mentioned in the corrective actions - getting alerted on Google Cloud Storage issues directly.
1. Define GCS as a "service" in the service-catalog
1. Add SLIs
1. Add SLOs
1. Done
cc @kwanyangu @brentnewton
epic