Ensure partial usage of Symfony validator assertions and Doctrine ORM attributes

[Toflar]

With my feature contributed in slevomat/coding-standard#1856 we can now make sure that some partial namespaces are not only allowed but enforced to be used the way we want them to 😎

This config now ensures this usage:

use Doctrine\ORM\Mapping as ORM;
use Symfony\Component\Validator\Constraints as Assert;

#[ORM\Column(type: 'string')]
#[Assert\NotNull]
#[Assert\NotBlank]
private string $myProperty = '';

[leofeyer]

Thank you @Toflar.

[Toflar]

Thanks, please tag the release 😊