REFACTOR(immich): move pvc to manifests

- Move PVC configuration to manifests/ folder
- Separate persistent storage from Helm values

immich/manifests/pvc.yaml

@@ -0,0 +1,12 @@
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: immich-library
+  namespace: immich
+spec:
+  accessModes:
+    - ReadWriteOnce
+  storageClassName: local-path-retain
+  resources:
+    requests:
+      storage: 5Gi