fix(opencloud): use Recreate rollout strategy for RWO PVC (DEV-538)

The 7.2.0 -> 7.4.0 rollout stalled because the default RollingUpdate
tried to start the new pod before terminating the old one, but they
both mount opencloud-data (RWO), causing Multi-Attach errors.

Switch to strategy: Recreate so the old pod is terminated first and
the volume detaches cleanly before the new pod starts. Same fix
pattern as bookstack (DEV-528) and other RWO-backed apps.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

apps/opencloud/opencloud-deployment.yaml

@@ -42,6 +42,8 @@ metadata:
   namespace: opencloud
 spec:
   replicas: 1
+  strategy:
+    type: Recreate
   selector:
     matchLabels:
       app: opencloud