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/helmrelease-cnpg.yaml

@@ -0,0 +1,27 @@
+apiVersion: helm.toolkit.fluxcd.io/v2
+kind: HelmRelease
+metadata:
+  name: cnpg
+  namespace: flux-system
+spec:
+  interval: 10m
+  targetNamespace: cnpg-system
+  chart:
+    spec:
+      chart: cloudnative-pg
+      version: 1.27.0
+      sourceRef:
+        kind: HelmRepository
+        name: cnpg
+        namespace: flux-system
+  install:
+    createNamespace: true
+    remediation:
+      retries: 3
+  upgrade:
+    remediation:
+      retries: 3
+  values:
+    image:
+      repository: ghcr.io/cloudnative-pg/postgresql
+    clusterImage: ghcr.io/cloudnative-pg/postgresql:17.4