Some gcloud cleanup commands are not standard delete commands - https://cloud.google.com/sdk/gcloud/reference/beta/compute/shared-vpc/associated-projects/remove as an example, thus cannot be simply added into the map in https://github.com/kubernetes-sigs/boskos/blob/master/cmd/janitor/gcp_janitor.py#L32-L91.

One option to support this is to add custom functions similar as clean_gke_cluster, but there's probably a better approach?

/cc @ixdy