hack/olm-registry: sync NS labels from MCC

this namespace resource exists (and is planned on being removed) in MCC
and differs from this resource slightly. Sync the annotations and
labels from that resource.

https://github.com/openshift/managed-cluster-config/blob/adfaa3e71a3cc20e2ab444f0359e188ee6fb467c/deploy/osd-must-gather-operator/01-openshift-must-gather-operator.Namespace.yaml#L5-L9

Signed-off-by: Brady Pratt <bpratt@redhat.com>

hack/olm-registry/olm-artifacts-template.yaml

@@ -33,7 +33,10 @@ objects:
       kind: Namespace
       metadata:
         name: openshift-must-gather-operator
+        annotations:
+          openshift.io/node-selector: ""
         labels:
+          openshift.io/cluster-logging: "true"
           openshift.io/cluster-monitoring: 'true'
     - apiVersion: operators.coreos.com/v1alpha1
       kind: CatalogSource