fix: Separate Backup CRs into their own kustomization

The Backup and Restore CRs need the rancher-backup CRDs to exist first.
Moved them to a separate kustomization that depends on the operator being ready.

infrastructure/addons/kustomization-rancher-backup-config.yaml

@@ -0,0 +1,16 @@
+apiVersion: kustomize.toolkit.fluxcd.io/v1
+kind: Kustomization
+metadata:
+  name: addon-rancher-backup-config
+  namespace: flux-system
+spec:
+  interval: 10m
+  prune: true
+  sourceRef:
+    kind: GitRepository
+    name: platform
+  path: ./infrastructure/addons/rancher-backup-config
+  timeout: 5m
+  suspend: false
+  dependsOn:
+    - name: addon-rancher-backup