This is required when a service/container has already been deployed, but has to be removed as part of update/upgrade or redeployment when the service is dropped.

We had this feature[1] in TripleO where we used to compare the new and the old config and remove all containers not in the new config (orphaned) managed by tripleo/paunch. Now that we manage every service separately there is no single place to get the new config to be deployed. We need a way to identify which all services/containers should be cleaned up and remove them during deployment/update/upgrade.

[1] https://github.com/openstack-k8s-operators/edpm-ansible/blob/main/roles/edpm_container_manage/tasks/delete_orphan.yml