fix: Install rancher-backup CRD chart before operator

The rancher-backup operator requires CRDs from the rancher-backup-crd
chart to be installed first.

infrastructure/addons/rancher-backup/helmrelease-rancher-backup-crd.yaml

@@ -0,0 +1,23 @@
+apiVersion: helm.toolkit.fluxcd.io/v2
+kind: HelmRelease
+metadata:
+  name: rancher-backup-crd
+  namespace: flux-system
+spec:
+  interval: 10m
+  targetNamespace: cattle-resources-system
+  chart:
+    spec:
+      chart: rancher-backup-crd
+      version: "106.0.2+up8.1.0"
+      sourceRef:
+        kind: HelmRepository
+        name: rancher-charts
+        namespace: flux-system
+  install:
+    createNamespace: true
+    remediation:
+      retries: 3
+  upgrade:
+    remediation:
+      retries: 3

infrastructure/addons/rancher-backup/kustomization.yaml

@@ -3,5 +3,6 @@ kind: Kustomization
 resources:
   - namespace.yaml
   - helmrepository-rancher-backup.yaml
+  - helmrelease-rancher-backup-crd.yaml
   - helmrelease-rancher-backup.yaml
   - b2-credentials-externalsecret.yaml