Merge branch '5.4' into 6.0

* 5.4:
  [Messenger] Fix dealing with unexpected payload in Redis transport
  [Filesystem] Update some PHPDoc of the Path class
  [VarDumper] Fix dumping mysqli_driver instances
  Fix missing ReturnTypeWillChange attributes
  [Cache] Add missing log when saving namespace
  [HttpKernel] Reset services between requests performed by KernelBrowser
  [HttpKernel] Remove unused argument in ArgumentMetadataFactory
  [Stopwatch] Fix test expectation
  [SecurityBundle] fix autoconfiguring Monolog's ProcessorInterface
  KernelTestCase resets internal state on tearDown
  [Security/Http] Fix getting password-upgrader when user-loader is a closure
  [HttpKernel] Fix extracting controller name from closures
  [Intl] fix wrong offset timezone PHP 8.1
  Fix type binding
  Remove duplicated test
  [Dotenv] Fix reading config for symfony/runtime when running dump command
  [Serializer] Remove unnecessary break
  [Runtime] Fix dotenv_overload with commands
  Make document type nodes ignorable
  Initialize Symfony\Component\Security\Core\Exception\AccountStatusException:: property

Author: nicolas-grekas

Exception/AccountStatusException.php

@@ -27,7 +27,7 @@ abstract class AccountStatusException extends AuthenticationException
     /**
      * Get the user.
      */
-    public function getUser(): UserInterface
+    public function getUser(): ?UserInterface
     {
         return $this->user;
     }