Fix #434

If [OwnerReferencesPermissionEnforcement](https://kubernetes.io/docs/reference/access-authn-authz/admission-controllers/#ownerreferencespermissionenforcement) is turned on, such as on OpenShift, ConfigConnector operator would fail with error `forbidden: cannot set blockOwnerDeletion if an ownerReference refers to a resource you can't set finalizers on`

operator/config/rbac/role.yaml

@@ -113,6 +113,7 @@ rules:
   - core.cnrm.cloud.google.com
   resources:
   - configconnectors/status
+  - configconnectors/finalizers
   - configconnectorcontexts/status
   verbs:
   - get