Fix Schema inheritance issue.

[likemusic]

Fix issue described in #1311 (comment)

it doesn't have #[\OA\Schema] but it have an extended Attribute :

#[\Attribute(\Attribute::TARGET_CLASS | \Attribute::TARGET_METHOD | \Attribute::TARGET_PROPERTY)]
class ApiExceptionAttribute extends \OpenApi\Attributes\Schema
{}


#[ApiExceptionAttribute]
class Class{}

It doesn't work when I do it like this. Using "type" works only if I use directly \OpenApi\Attributes\Schema

[DerManoMann]

I know this doesn't break any tests ATM, but I'll need some time thinking about this. I am pretty sure there was a reason for the explicit check... if only I could remember :/

[DerManoMann]

Superseded by #1403