fix: Add missing namespace references in rendered output

This patch patches the namespace name in all generates resources. It can
still be adjusting using kustomize, but provides functional experience
for the plain manifest installation.

kustomization.yaml

@@ -1,5 +1,6 @@
 apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
+namespace: system-upgrade
 resources:
 - manifests/clusterrole.yaml
 - manifests/clusterrolebinding.yaml