bug symfony#60953 [DoctrineBridge] Restore compatibility with Doctrine ODM (pepeh)

This PR was merged into the 6.4 branch.

Discussion
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[DoctrineBridge] Restore compatibility with Doctrine ODM

| Q             | A
| ------------- | ---
| Branch?       | 6.4
| Bug fix?      | yes
| New feature?  | no
| Deprecations? | no
| Issues        | Fix symfony#60921
| License       | MIT

Ensure that the metadata class being inspected is an instance of Doctrine\ORM\Mapping\ClassMetadata to fix ODM integration when both ODM and ORM packages are installed in the same Symfony project.

Commits
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665f927 [DoctrineBridge] Restore compatibility with Doctrine ODM by validating $class object type

Author: fabpot

src/Symfony/Bridge/Doctrine/Validator/Constraints/UniqueEntityValidator.php

@@ -11,7 +11,6 @@
 
 namespace Symfony\Bridge\Doctrine\Validator\Constraints;
 
-use Doctrine\ORM\Mapping\ClassMetadata as OrmClassMetadata;
 use Doctrine\Persistence\ManagerRegistry;
 use Doctrine\Persistence\Mapping\ClassMetadata;
 use Doctrine\Persistence\ObjectManager;
@@ -93,7 +92,7 @@ public function validate(mixed $entity, Constraint $constraint)
                 throw new ConstraintDefinitionException(sprintf('The field "%s" is not mapped by Doctrine, so it cannot be validated for uniqueness.', $fieldName));
             }
 
-            if (property_exists(OrmClassMetadata::class, 'propertyAccessors')) {
+            if (property_exists($class, 'propertyAccessors')) {
                 $fieldValue = $class->propertyAccessors[$fieldName]->getValue($entity);
             } else {
                 $fieldValue = $class->reflFields[$fieldName]->getValue($entity);