It would be better to make serving operator deployed on specific project such as "openshift-knative-serving" project by default.

There are two reasons:

1. Almost all operators released by RH are deployed on `openshift-` namespace since v4. (openshit- namespace cannot be created by general users. )
2. monitoring needs to use `openshift-*` namespace as per https://docs.google.com/document/d/1xszqeJGVmNS8j8-pRIZ2I-wpF-9SFM9xKFm5Ibnae50/edit#heading=h.37avim0ervi