Respect assets mode config in controller (#2280)

| Q | A |

|---------------|---------------------------------------------------------------------------------------------------------------------------|
| Bug fix?      | yes
| New feature?  | no
| Deprecations? | no
| Issues        | -

Currently the `SwaggerUiController` doesn't respect the `assets_mode`
configuration added in #2251.

```yaml
nelmio_api_doc:
  html_config:
    assets_mode: cdn
```

As far as I can tell, there's no reason for the default any more as it
can be set through the configuration and overridden in the `DumpCommand`
command using the `html-config` option.

src/Controller/SwaggerUiController.php

@@ -12,7 +12,6 @@
 namespace Nelmio\ApiDocBundle\Controller;
 
 use Nelmio\ApiDocBundle\Exception\RenderInvalidArgumentException;
-use Nelmio\ApiDocBundle\Render\Html\AssetsMode;
 use Nelmio\ApiDocBundle\Render\RenderOpenApi;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
@@ -35,7 +34,6 @@ public function __invoke(Request $request, string $area = 'default'): Response
         try {
             $response = new Response(
                 $this->renderOpenApi->renderFromRequest($request, RenderOpenApi::HTML, $area, [
-                    'assets_mode' => AssetsMode::BUNDLE,
                     'ui_renderer' => $this->uiRenderer,
                 ]),
                 Response::HTTP_OK,

tests/Functional/TestKernel.php

@@ -18,6 +18,7 @@
 use Hateoas\Configuration\Embedded;
 use JMS\SerializerBundle\JMSSerializerBundle;
 use Nelmio\ApiDocBundle\NelmioApiDocBundle;
+use Nelmio\ApiDocBundle\Render\Html\AssetsMode;
 use Nelmio\ApiDocBundle\Tests\Functional\Entity\BazingaUser;
 use Nelmio\ApiDocBundle\Tests\Functional\Entity\JMSComplex80;
 use Nelmio\ApiDocBundle\Tests\Functional\Entity\JMSComplex81;
@@ -242,6 +243,9 @@ protected function configureContainer(ContainerBuilder $c, LoaderInterface $load
 
         // Filter routes
         $c->loadFromExtension('nelmio_api_doc', [
+            'html_config' => [
+                'assets_mode' => AssetsMode::BUNDLE,
+            ],
             'use_validation_groups' => boolval(self::USE_VALIDATION_GROUPS === $this->flag),
             'documentation' => [
                 'info' => [