Acceptance criteria

• openshift/descheduler is rebased
• openshift/cluster-kube-descheduler-operator is rebased
• With https://github.com/kubernetes-sigs/descheduler/pull/888 merged the descheduler operator needs to update the rbac rules: https://github.com/openshift/cluster-kube-descheduler-operator/blob/master/manifests/4.11/cluster-kube-descheduler-operator.v4.11.0.clusterserviceversion.yaml#L108 and https://github.com/openshift/cluster-kube-descheduler-operator/blob/master/deploy/02_clusterrole.yaml
• TBD: e.g. descheduling framework related changes + documentation + tests