Detect doctrine bridge version

Although it is in the PropertyInfo sub namespace, the DoctrineExtractor
class is in the doctrine bridge, which means we should detect the
doctrine bridge version and not the PropertyInfo component version.

Fixes #883, Closes #884

DependencyInjection/DoctrineExtension.php

@@ -25,7 +25,6 @@
 use Symfony\Component\DependencyInjection\ServiceLocator;
 use Symfony\Component\Form\AbstractType;
 use Symfony\Component\Messenger\MessageBusInterface;
-use Symfony\Component\PropertyInfo\PropertyInitializableExtractorInterface;
 
 /**
  * DoctrineExtension is an extension for the Doctrine DBAL and ORM library.
@@ -800,7 +799,7 @@ protected function loadOrmCacheDrivers(array $entityManager, ContainerBuilder $c
     private function loadPropertyInfoExtractor($entityManagerName, ContainerBuilder $container)
     {
         $propertyExtractorDefinition = $container->register(sprintf('doctrine.orm.%s_entity_manager.property_info_extractor', $entityManagerName), DoctrineExtractor::class);
-        if (interface_exists(PropertyInitializableExtractorInterface::class)) {
+        if (property_exists(DoctrineExtractor::class, 'entityManager')) {
             $argumentId = sprintf('doctrine.orm.%s_entity_manager', $entityManagerName);
         } else {
             $argumentId = sprintf('doctrine.orm.%s_entity_manager.metadata_factory', $entityManagerName);