feature #21505 [Config][DI] Add ComposerResource to track the runtime engine + deps (nicolas-grekas)

This PR was merged into the 3.3-dev branch.

Discussion
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[Config][DI] Add ComposerResource to track the runtime engine + deps

| Q             | A
| ------------- | ---
| Branch?       | master
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

So that the container is invalidated whenever a new PHP runtime is used, a PHP-extension is added, or vendors are changed.

Commits
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a960c761d1 [Config][DI] Add ComposerResource to track runtime + vendors

Author: fabpot

DependencyInjection/FrameworkExtension.php

@@ -23,7 +23,6 @@
 use Symfony\Component\DependencyInjection\Exception\LogicException;
 use Symfony\Component\DependencyInjection\Reference;
 use Symfony\Component\DependencyInjection\Loader\XmlFileLoader;
-use Symfony\Component\Config\Resource\FileResource;
 use Symfony\Component\Finder\Finder;
 use Symfony\Component\HttpKernel\DependencyInjection\Extension;
 use Symfony\Component\Config\FileLocator;
@@ -994,8 +993,7 @@ private function getValidatorMappingFiles(ContainerBuilder $container, array &$f
     {
         if (interface_exists('Symfony\Component\Form\FormInterface')) {
             $reflClass = new \ReflectionClass('Symfony\Component\Form\FormInterface');
-            $files['xml'][] = $file = dirname($reflClass->getFileName()).'/Resources/config/validation.xml';
-            $container->addResource(new FileResource($file));
+            $files['xml'][] = dirname($reflClass->getFileName()).'/Resources/config/validation.xml';
         }
 
         foreach ($container->getParameter('kernel.bundles_metadata') as $bundle) {