Merge pull request #96272 from openshift-cherrypick-robot/cherry-pick-95865-to-enterprise-4.18

[enterprise-4.18] CNV#50733: OCV Operator installation via CLI doesn't include the label `openshift.io/cluster-monitoring: "true"` in the `ns/openshift-cnv`

Author: skopacz1

modules/virt-subscribing-cli.adoc

@@ -26,6 +26,8 @@ apiVersion: v1
 kind: Namespace
 metadata:
   name: {CNVNamespace}
+  labels:
+    openshift.io/cluster-monitoring: "true"
 ---
 apiVersion: operators.coreos.com/v1
 kind: OperatorGroup