[sylva-1.4] multus-init fails to reconcile in workload cluster

This was observed in a third-party CI on update-workload-cluster upgrading from 1.3 to 1.4

   ╰┄╴Ready                                     False      ReconciliationFailed Policy/sylva-system/calico-skip-cni dry-run failed:
 admission webhook "validate-policy.kyverno.svc" denied the request:
 spec.rules[1].targets[0].namespace:
 Invalid value: "calico-system":
 This field can be ignored or should have value of the namespace where the policy is being created