[TomasVotruba]

With withImportNames(), a name written partially qualified in the source is now kept as written, without a new option:

use App\Search\Field;
use Doctrine\ORM\Mapping as ORM;

#[ORM\Column]            // kept
new Field\TextField();   // kept, before: "use App\Search\Field\TextField; new TextField()"

• Names that start with an aliased use (as ORM, as Assert) were already kept. This PR adds regression fixtures for them: attributes, new, ::class, types, docblocks, Doctrine annotations.
• Names that start with a plain namespace use (use App\Search\Field; Field\TextField) and relative names (namespace\Sub\Foo) are now kept too. The check uses the parser's originalName attribute.
• Fully qualified names (\App\Foo) and names that rules create are still imported.

This is a behaviour change. 10 existing fixtures asserted that partially qualified names get imported. They are now skip_* fixtures.

Alternative to #8884, with no new withImportNames() argument.