feat(jsonnet): Add support for Google Cloud Build stages (#4853)
feat(jsonnet): Add support for Google Cloud Build stages (#4853)

Note that this only adds support for `cloudbuild.yml` structures passed to a function. Not structures coming from an artifact.
spinnaker/spinnaker,spinnaker/spinnaker,spinnaker/spinnaker,duftler/spinnaker,duftler/spinnaker,duftler/spinnaker,spinnaker/spinnaker,duftler/spinnaker