Description of problem:

As part of the Image based upgrades, when creating the seed image, the seed cluster that is deployed and managed by ACM/ZTP/Gitops needs to be disassociated from the hub.  This is accomplished by removing the siteConfig CR of the managedcluster from the kustomization yaml.  

It is observed that the open-cluster-observability-addon namespace and associated deployment, stateful set and pods continues to exist.  

Version-Release number of selected component (if applicable):

ACM 2.9.3

How reproducible:

Steps to Reproduce:

1. Delete siteconfig from kustomization.yaml
2. once the mangedcluster CR and the managedcluster namespace are deleted access the managedcluster 
3. oc get ns open-cluster-observability-addon

Actual results:

open-cluster-management-observability-addon and associated objects continue to exist

Expected results:

ACM clean up all the artifacts is puts on the managedcluster

Additional info: