check T of mixed&Foo and T of mixed|Foo

[schlndh]

Fixes https://phpstan.org/r/a3548a66-d83b-46d4-b418-7dbc038cbeb1 (all var_dumps should be reported).
Fixes https://phpstan.org/r/7ec28c62-5411-412a-a4c8-c7f9253b918d (there should be actual type instead of stdClass).

[schlndh]

This line hid the following issue (CallMethodsRuleTest):

Parameter #1 $other of method Test\CollectionWithStaticParam::add() expects static(Test\AppleCollection), Test\AppleCollection given.

[ondrejmirtes]

1. Looks like this fixed Closure($this) does not accept Closure($this) phpstan#9009, please add a regression test :)
2. There's a levels test failure https://github.com/phpstan/phpstan-src/actions/runs/8030898804/job/21938683114, you can just re-run that locally and commit the updated JSON file :)

Thank you very much!

[schlndh]

I thought that I caused a false positive here: https://github.com/drupal/drupal/blob/5c30729a8365dc7e7d649d597a11f170eecff26c/core/modules/migrate/tests/src/Kernel/MigrateTestBase.php#L173
https://github.com/phpstan/phpstan-src/actions/runs/8031005259/job/21938938357?pr=2940

  ------ ------------------------------------------------------------------ 
  Line   core/modules/migrate/tests/src/Kernel/MigrateTestBase.php         
 ------ ------------------------------------------------------------------ 
  173    Call to an undefined static method                                
         Drupal\Tests\migrate\Kernel\MigrateTestBase::migrateDumpAlter().  
 ------ ------------------------------------------------------------------ 

But it looks like the issue is already present in phpstan, I just changed the error message: https://phpstan.org/r/1475efe6-5aaf-4922-bab9-c4ebacc8d24c

[ondrejmirtes]

Thank you!