Currently, the operator only pays attention to CR's created in the `knative-serving` namespace that are named `knative-serving`. Is this what we want?

Open Questions:
1) does the console guide the user to create the CR in a valid ns, i.e. not "openshift-operators"?
2) does monitoring/metrics require the CR to reside in a particular ns?

The operator doesn't care, and will happily create knative-serving in whatever ns the CR lives in... once we remove the existing restriction.