[Validator] Allow load mappings from attributes without doctrine/annotations.

Author: derrabus

Tests/Validator/DoctrineLoaderTest.php

@@ -46,7 +46,8 @@ protected function setUp(): void
     public function testLoadClassMetadata()
     {
         $validator = Validation::createValidatorBuilder()
-            ->enableAnnotationMapping()
+            ->enableAnnotationMapping(true)
+            ->addDefaultDoctrineAnnotationReader()
             ->addLoader(new DoctrineLoader(DoctrineTestHelper::createTestEntityManager(), '{^Symfony\\\\Bridge\\\\Doctrine\\\\Tests\\\\Fixtures\\\\DoctrineLoader}'))
             ->getValidator()
         ;
@@ -151,7 +152,8 @@ public function testLoadClassMetadata()
     public function testFieldMappingsConfiguration()
     {
         $validator = Validation::createValidatorBuilder()
-            ->enableAnnotationMapping()
+            ->enableAnnotationMapping(true)
+            ->addDefaultDoctrineAnnotationReader()
             ->addXmlMappings([__DIR__.'/../Resources/validator/BaseUser.xml'])
             ->addLoader(
                 new DoctrineLoader(
@@ -192,7 +194,8 @@ public function regexpProvider()
     public function testClassNoAutoMapping()
     {
         $validator = Validation::createValidatorBuilder()
-            ->enableAnnotationMapping()
+            ->enableAnnotationMapping(true)
+            ->addDefaultDoctrineAnnotationReader()
             ->addLoader(new DoctrineLoader(DoctrineTestHelper::createTestEntityManager(), '{.*}'))
             ->getValidator();