revert: restore Vaultwarden to original working configuration

- Remove nginx sidecar (was causing compatibility issues)
- Restore service targetPort to 80
- Use latest tag instead of fixed version
- Remove health probes
- Restore simple configuration

User will reset data by deleting PVC.

apps/vaultwarden/manifests/vaultwarden-service.yaml

@@ -11,5 +11,5 @@ spec:
     - protocol: TCP
       name: http
       port: 80
-      targetPort: 8080
+      targetPort: 80
   type: ClusterIP