fully_qualified_strict_types should support multiple attributes separated by comma

[mvorisek]

Feature request

example:

<?php

namespace Ns;

#[
    \A\B(),
    \A\C,
]
class Foo {}

Currently only the first attribute is imported.

[Wirone]

It should be easily possible after #7909 got merged - all attribute items can be collected from any #[] and used classes can be imported if needed.