Autoloader bug when used with Doctrine and Annotations.

Doctrine is using manually `require_once` and if it happens Enum class to be in Entity folder - It bypasses the autoloader and __constructStatic is never called.

https://github.com/doctrine/persistence/blob/2.1.x/lib/Doctrine/Persistence/Mapping/Driver/AnnotationDriver.php#L234

I don't have idea how to fix it generally. For quick fix in my code i did intermediate class.

```php
final class EntityEnum extends NonEntityEnum
{
}
```

```php
abstract class NonEntityEnum extends Enumeration
{
public static EntityEnum $value;

protected static function initializeValues(): void
{
self::$value = new EntityEnum();
}
}
```

so when Doctrine `require_once 'EntityEnum.php';` it will lead autoloader to `NonEntityEnum` and it will call the constructStatic.