Merge branch '6.4' into 7.0

* 6.4:
  [OptionsResolver] Improve invalid type message on nested option
  cs fix
  Update KernelTestCase.php
  [DoctrineBridge] Silence ORM deprecation
  add missing default-doctrine-dbal-provider cache pool attribute to XSD

Author: nicolas-grekas

Tests/DoctrineTestHelper.php

@@ -60,6 +60,10 @@ public static function createTestConfiguration(): Configuration
         $config->setMetadataDriverImpl(new AttributeDriver([__DIR__.'/../Tests/Fixtures' => 'Symfony\Bridge\Doctrine\Tests\Fixtures'], true));
         $config->setSchemaManagerFactory(new DefaultSchemaManagerFactory());
 
+        if (method_exists(Configuration::class, 'setLazyGhostObjectEnabled')) {
+            $config->setLazyGhostObjectEnabled(true);
+        }
+
         return $config;
     }