feature #62302 [Routing] Simplify importing routes defined on controller services (nicolas-grekas)

This PR was merged into the 7.4 branch.

Discussion
----------

[Routing] Simplify importing routes defined on controller services

| Q             | A
| ------------- | ---
| Branch?       | 7.4
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| Issues        | -
| License       | MIT

Fine-tuning #61492

Before:

```yaml
controllers:
    resource: attributes
    type: tagged_services
```

After:

```yaml
controllers:
    resource: routing.controllers
```

And when using `MicroKernelTrait` (the default recipe), there's nothing to configure to have routes loaded from `#[Route]` attributes:

```yaml
#config/routes.yaml
# the file can be just empty from any config, and only have a comment saying what it's for
```

```php
// config/routes.php
return Routes::config([
]);
```

The way to opt-out from this `routing.controllers` import would be to override the `Kernel::configureRoutes()` method.

Commits
-------

13e25caae7d [Routing] Simplify importing routes defined on controller services

Author: fabpot

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

@@ -187,8 +187,7 @@ public static function config(array $config): array
  *
  *     return Routes::config([
  *         'controllers' => [
- *             'resource' => 'attributes',
- *             'type' => 'tagged_services',
+ *             'resource' => 'routing.controllers',
  *         ],
  *     ]);
  *     ```