Merge branch '6.4' into 7.0

* 6.4: (29 commits)
  fix tests
  add missing method
  fix merge
  fix test
  fix merge
  fix test
  change test to use a real ObjectManager
  [Mailer] Document the usage of custom headers in Infobip bridge
  [SecurityBundle] Add `provider` XML attribute to the authenticators it’s missing from
  [DoctrineBridge] Test reset with a true manager
  Sync php-cs-fixer config file with 7.2
  [HttpClient] Fix parsing SSE
  [Notifier] Fix thread key in GoogleChat bridge
  [HttpKernel][Security] Fix accessing session for stateless request
  [Serializer] Fix `ObjectNormalizer` with property path
  test handling of special "value" constraint option
  [PhpUnitBridge] Add missing import
  [FrameworkBundle] Fix setting default context for certain normalizers
  [57251] Missing translations for Romanian (ro)
  [ErrorHandler] Fix rendered exception code highlighting on PHP 8.3
  ...

Author: xabbuh

Firewall/ContextListener.php

@@ -87,7 +87,7 @@ public function authenticate(RequestEvent $event): void
         }
 
         $request = $event->getRequest();
-        $session = $request->hasPreviousSession() ? $request->getSession() : null;
+        $session = !$request->attributes->getBoolean('_stateless') && $request->hasPreviousSession() ? $request->getSession() : null;
 
         $request->attributes->set('_security_firewall_run', $this->sessionKey);