No pruning of audit and revision-status ConfigMap in openshift-apiserver and openshift-oauth-apiserver on OpenShift Container Platform 4

Issue

• In openshift-apiserver and openshift-oauth-apiserver namespaces we can see that audit and revision-status config maps have lots of versions. In openshift-kube-apiserver there is a revision-pruner cronjob, which seems to be missing in the above two namespaces.

  $ oc get cm -A | grep revision-status | cut -d ' ' -f1 | sort -h | uniq -c | sort -h
        5 openshift-etcd
        5 openshift-kube-apiserver
        5 openshift-kube-controller-manager
        6 openshift-kube-scheduler
        8 openshift-oauth-apiserver
       23 openshift-apiserver
  
  $ oc get cm -A | grep audit | cut -d ' ' -f1 | sort -h | uniq -c | sort -h
        1 openshift-monitoring
        6 openshift-kube-apiserver
        9 openshift-oauth-apiserver
       24 openshift-apiserver