fix(storages): hide PR suffix for services and fix instantSave logic

- Restrict "Add suffix for PR deployments" checkbox to non-service
  resources in both shared and service file-storage views
- Replace condition `is_preview_deployments_enabled` with `!$isService`
  for PR suffix visibility in storages/show.blade.php
- Fix FileStorage::instantSave() to use authorize + syncData instead
  of delegating to submit(), preventing unintended side effects
- Add $this->validate() to Storages/Show::instantSave() before saving
- Add response content schemas to storages API OpenAPI annotations
- Add additionalProperties: false to storage update request schema
- Rewrite PreviewDeploymentBindMountTest with behavioral tests of
  addPreviewDeploymentSuffix instead of file-content inspection

app/Livewire/Project/Service/FileStorage.php

@@ -194,9 +194,11 @@ class FileStorage extends Component
         }
     }
 
-    public function instantSave()
+    public function instantSave(): void
     {
-        $this->submit();
+        $this->authorize('update', $this->resource);
+        $this->syncData(true);
+        $this->dispatch('success', 'File updated.');
     }
 
     public function render()