[9.x] Fallback to resolving controller middleware like before (#44590)

* Fallback to resolving controller middleware like before

* Allow AsController actions to resolve controller middleware

* Use method_exists instead of inheritance checks

Author: lorisleiva

src/Illuminate/Routing/Route.php

@@ -1093,7 +1093,7 @@ public function controllerMiddleware()
             );
         }
 
-        if (is_a($controllerClass, Controller::class, true)) {
+        if (method_exists($controllerClass, 'getMiddleware')) {
             return $this->controllerDispatcher()->getMiddleware(
                 $this->getController(), $controllerMethod
             );