[PHP 8] Fixup attributes features based on use in practise

[TomasVotruba]

This fixes previously nested annotation, that are now attributes that were not parsed correctly:

class SomeController
{

    #[Response('some_description', code: 'cz')]
    #[Response(description: 'some_description_2', code: 'com')]
    public function responses(): void
    {
    }

    #[RequestParameter(name: 'name_value', type: 'type_value', in: 'in_value')]
    #[RequestParameter(in: 'in_value_2', type: 'type_value_2', name: 'name_value_2')]
    public function requestParameters(): void
    {
    }

    #[Negotiation('some_suffix')]
    #[Negotiation(suffix: 'some_suffix_2')]
    public function negotiations(): void
    {
    }

}

Follow up to https://github.com/apitte/core/pull/161

[TomasVotruba]

This is ready to merge now :+1:

[f3l1x]

Thank you :-)

[TomasVotruba]

You're welcome :+1:

I really like how tests are written very precisely. Upgrading code was very intuitive thanks to exact failing messages, great job :clap: