Serverless 1.22 introduces an official label for Knative system namespace. We have used a manual label (knative.openshift.io/system-namespace) until now, but we should replace it with the default label (knative.openshift.io/part-of). 

Draft Change:
https://docs.google.com/document/d/1yp1nG4fQklmr73YLx8nnEqEPU-TD3sUS0-53PoRrN34/edit#heading=h.ryzfgujh2ykc