Merge branch '5.4' into 6.0

* 5.4:
  [Messenger] Fix function name in TriggerSql on postgresql bridge to support table name with schema
  [HttpClient] Fix the CS fix
  Workaround disabled "var_dump"
  [Serializer] Respect default context in DateTimeNormalizer::denormalize

# Conflicts:
#	src/Symfony/Component/ErrorHandler/ErrorHandler.php
#	src/Symfony/Component/HttpKernel/EventListener/DebugHandlersListener.php

Author: ogizanagi

ErrorHandler.php

@@ -361,7 +361,7 @@ public function screamAt(int $levels, bool $replace = false): int
     private function reRegister(int $prev): void
     {
         if ($prev !== $this->thrownErrors | $this->loggedErrors) {
-            $handler = set_error_handler('var_dump');
+            $handler = set_error_handler('is_int');
             $handler = \is_array($handler) ? $handler[0] : null;
             restore_error_handler();
             if ($handler === $this) {
@@ -579,7 +579,7 @@ public static function handleFatalError(array $error = null): void
         $sameHandlerLimit = 10;
 
         while (!\is_array($handler) || !$handler[0] instanceof self) {
-            $handler = set_exception_handler('var_dump');
+            $handler = set_exception_handler('is_int');
             restore_exception_handler();
 
             if (!$handler) {