fix: Split CNP operator from CNP cluster to fix CRD dependency

- Move CNP operator HelmRelease to cnpg-operator folder
- Create addon-cnpg-operator kustomization (deploys operator first)
- Update addon-cnpg to dependOn addon-cnpg-operator
- Add addon-cnpg as dependency for addon-rancher (needs database)

infrastructure/addons/cnpg-operator/helmrepository-cnpg.yaml

@@ -0,0 +1,8 @@
+apiVersion: source.toolkit.fluxcd.io/v1
+kind: HelmRepository
+metadata:
+  name: cnpg
+  namespace: flux-system
+spec:
+  interval: 1h
+  url: https://cloudnative-pg.github.io/charts