global exclude add kube-system

General MR

Summary

Ensuring we aren't blocking or acting on anything in kube-system since different distros and environments have different images/services/templates which are instantiated into the kube-system namespace. This is becoming a headache in CI, for helm_tests and upgrade stages:

Warning PolicyViolation pod/coredns-67f877bcd9-hk4b9 policy restrict-image-registries/validate-registries fail: validation failure: validation error

Upgrade Notices

N/A