Merge branch '6.0' into 6.1

* 6.0:
  [VarDumper] fix tests on PHP 8.2
  [Mime] Add null check for EmailHeaderSame
  Add approriate description to CollectionToArrayTransformer::reverseTransform docblock
  [PropertyInfo] CS fixes
  [VarDumper] fix test on PHP 8.2
  [Config] Fix looking for single files in phars with GlobResource
  Revert "bug #46327 [HttpKernel] Allow ErrorHandler ^5.0 to be used in HttpKernel 4.4 (mpdude)"

Author: nicolas-grekas

Tests/Caster/ReflectionCasterTest.php

@@ -39,7 +39,7 @@ public function testReflectionCaster()
   +name: "ReflectionClass"
 %Aimplements: array:%d [
 %A]
-  constants: array:3 [
+  constants: array:%d [
     0 => ReflectionClassConstant {
       +name: "IS_IMPLICIT_ABSTRACT"
       +class: "ReflectionClass"
@@ -58,7 +58,7 @@ public function testReflectionCaster()
       modifiers: "public"
       value: %d
     }
-  ]
+%A]
   properties: array:%d [
     "name" => ReflectionProperty {
 %A    +name: "name"