Review-apps - Count k8s resources and measures GCP quotas

Closes gitlab-org/quality/engineering-productivity-infrastructure#37

See merge request !104595



Merged-by: Rémy Coutable <remy@rymai.me>
Approved-by: Rémy Coutable <remy@rymai.me>
Co-authored-by: ddieulivol <ddieulivol@gitlab.com>