[Routing] Simplify importing routes defined on controller services

Author: nicolas-grekas

Kernel/MicroKernelTrait.php

@@ -79,15 +79,13 @@ private function configureRoutes(RoutingConfigurator $routes): void
         $routes->import($configDir.'/{routes}/'.$this->environment.'/*.{php,yaml}');
         $routes->import($configDir.'/{routes}/*.{php,yaml}');
 
+        $routes->import('routing.controllers');
+
         if (is_file($this->getConfigDir().'/routes.yaml')) {
             $routes->import($configDir.'/routes.yaml');
         } else {
             $routes->import($configDir.'/{routes}.php');
         }
-
-        if ($fileName = (new \ReflectionObject($this))->getFileName()) {
-            $routes->import($fileName, 'attribute');
-        }
     }
 
     /**

Tests/Fixtures/reference.php

@@ -184,8 +184,7 @@ public static function config(array $config): array
  *
  *     return Routes::config([
  *         'controllers' => [
- *             'resource' => 'attributes',
- *             'type' => 'tagged_services',
+ *             'resource' => 'routing.controllers',
  *         ],
  *     ]);
  *     ```