fix(symfony): fix property restrictions for root resource with dynamic validation groups

[c1tru55]

Q	A
Branch?	4.1
Tickets	n/a
License	MIT
Doc PR	n/a

similar to #6908

#[ApiResource(
    validationContext: [
        'groups' => ValidationGroupsGenerator::class,
    ],
)]
class Foo

If root resource has dynamic validation groups via \ApiPlatform\Symfony\Validator\ValidationGroupsGeneratorInterface service - validation groups for it in ValidatorPropertyMetadataFactory are evaluated as plain array ['\App\Validator\ValidationGroupsGenerator'] and as a result no constraint is found for these validation groups.

use same checks as in https://github.com/api-platform/core/blob/main/src/Symfony/Validator/Validator.php#L39-L45

[soyuka]

Nice catch, thanks! We could move this code to a trait to share the code wdyt?