Merge branch '5.4' into 6.0

* 5.4: (46 commits)
  move username/password fix to non-deprecated Connection class
  cs fix
  [VarDumper] Fix dumping twig templates found in exceptions
  do not replace definition arguments that have not been configured
  fix Console tests on Windows
  [Validator] Add translations for CIDR constraint
  [Dotenv] Fix testLoadEnv() to start from a fresh context
  [Console] Add completion to server:dump command
  bug #42194 [RateLimiter] fix: sliding window policy to use microtime
  [Validator] Update validators.sr_Cyrl.xlf
  [Validator] Update validators.sr_Latn.xlf
  Add suggestions for the option 'format' of lints commands: twig, yaml and xliff
  [VarDumper] Add support for Fiber
  uzb translation
  Update validators.uz.xlf
  Fix logging of impersonator introduced in 5.3
  [Console] Add show proxified command class in completion debug
  skip command completion tests with older Symfony Console versions
  [Uid] Allow use autocompletion
  [Console] Add completion to messenger:setup-transports command
  ...

Author: nicolas-grekas

Firewall/ContextListener.php

@@ -240,7 +240,8 @@ protected function refreshUser(TokenInterface $token): ?TokenInterface
                     $context = ['provider' => \get_class($provider), 'username' => $refreshedUser->getUserIdentifier()];
 
                     if ($token instanceof SwitchUserToken) {
-                        $context['impersonator_username'] = $token->getUserIdentifier();
+                        $originalToken = $token->getOriginalToken();
+                        $context['impersonator_username'] = $originalToken->getUserIdentifier();
                     }
 
                     $this->logger->debug('User was reloaded from a user provider.', $context);