[AutoImport] Handle no change on same shortname from FullyQualified on NameImporter

[samsonasik]

Cherry-picked from PR:

• Add PostRectorInterface instance class names to list of applied rectors #7304

handle to cover warning:

WARNING: On fixture file "skip_conflict_last_name_in_usage.php.inc" for test "Rector\Tests\Issues\AutoImport\AutoImportTest"
File not changed but some Rector rules applied:
 * Rector\PostRector\Rector\NameImportingPostRector
..  244 / 4779 (  5%)
..
WARNING: On fixture file "skip_no_namespace_used_class.php.inc" for test "Rector\Tests\Issues\AutoImport\AutoImportTest"
File not changed but some Rector rules applied:
 * Rector\PostRector\Rector\NameImportingPostRector

see https://github.com/rectorphp/rector-src/actions/runs/17877243809/job/50840264966#step:5:20

[samsonasik]

All checks have passed 🎉 @TomasVotruba I am merging it ;)