[PHP 8.1] Add nested attributes support - part #1

[TomasVotruba]

See rectorphp/rector#6792

Sister rule from https://wiki.php.net/rfc/new_in_initializers for nesting attributes

 use Symfony\Component\Validator\Constraints as Assert;

-/**
- * @Assert\All({
- *     @Assert\NotNull
- * })
- */
+#[Assert\All([
+    new Assert\NotNull()
+])]