Merge branch '5.4' into 6.3

* 5.4:
  [Form] Fix merging params & files when "multiple" is enabled
  [HttpFoundation] Do not swallow trailing `=` in cookie value
  Handle Sendinblue error responses without a message key
  [Serializer] Fix collecting only first missing constructor argument
  [Messenger] Fix DoctrineOpenTransactionLoggerMiddleware
  [Translation] Add missing return type
  [Validator] add missing catalan translations

Author: nicolas-grekas

Messenger/DoctrineOpenTransactionLoggerMiddleware.php

@@ -26,6 +26,8 @@
 class DoctrineOpenTransactionLoggerMiddleware extends AbstractDoctrineMiddleware
 {
     private $logger;
+    /** @var bool */
+    private $isHandling = false;
 
     public function __construct(ManagerRegistry $managerRegistry, string $entityManagerName = null, LoggerInterface $logger = null)
     {
@@ -36,6 +38,12 @@ public function __construct(ManagerRegistry $managerRegistry, string $entityMana
 
     protected function handleForManager(EntityManagerInterface $entityManager, Envelope $envelope, StackInterface $stack): Envelope
     {
+        if ($this->isHandling) {
+            return $stack->next()->handle($envelope, $stack);
+        }
+
+        $this->isHandling = true;
+
         try {
             return $stack->next()->handle($envelope, $stack);
         } finally {
@@ -44,6 +52,7 @@ protected function handleForManager(EntityManagerInterface $entityManager, Envel
                     'message' => $envelope->getMessage(),
                 ]);
             }
+            $this->isHandling = false;
         }
     }
 }