In ACM-3327, support was added for cluster-scoped policies. In this case, it was limited to Gatekeeper ConstraintTemplates and constraints.

To handle the removal of these, owner references cannot be used due to it being cluster-scoped, so a finalizer was added of "policy.open-cluster-management.io/cleanup-cluster-scoped-policies" to Policy objects that include such cluster-scoped policies.

When the governance-policy-framework addon is uninstalled, these finalizers need to be removed in order for the Policy objects to be removed. To accomplish this, perform a similar cleanup as was done for the config-policy-controller by using an addon framework predelete hook in the governance-policy-addon-controller.