fix(symfony): no read should throw on wrong uri variables

fixes #6358

src/State/Processor/SerializeProcessor.php

@@ -51,8 +51,14 @@ public function process(mixed $data, Operation $operation, array $uriVariables =
         // @see ApiPlatform\State\Processor\RespondProcessor
         $context['original_data'] = $data;
 
+        $class = $operation->getClass();
+        if ($request->attributes->get('_api_resource_class') !== $operation->getClass()) {
+            $class = $request->attributes->get('_api_resource_class');
+            trigger_deprecation('api-platform/core', '3.3', 'The resource class on the router is not the same as the operation\'s class which leads to wrong behaviors. Prefer using "stateOptions" if you need to change the entity class.');
+        }
+
         $serializerContext = $this->serializerContextBuilder->createFromRequest($request, true, [
-            'resource_class' => $operation->getClass(),
+            'resource_class' => $class,
             'operation' => $operation,
         ]);