N°6934 - Symfony 6.4 - upgrade Symfony bundles to 6.4 (#580)

* Update Symfony lib to version ~6.4.0
* Update code missing return type
* Add an iTop general configuration entry to store application secret (Symfony mandatory parameter)
* Use dependency injection in ExceptionListener & UserProvider classes

lib/symfony/framework-bundle/Resources/config/serializer_debug.php

@@ -0,0 +1,32 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\DependencyInjection\Loader\Configurator;
+
+use Symfony\Component\Serializer\DataCollector\SerializerDataCollector;
+use Symfony\Component\Serializer\Debug\TraceableSerializer;
+
+return static function (ContainerConfigurator $container) {
+    $container->services()
+        ->set('debug.serializer', TraceableSerializer::class)
+            ->decorate('serializer')
+            ->args([
+                service('debug.serializer.inner'),
+                service('serializer.data_collector'),
+            ])
+
+        ->set('serializer.data_collector', SerializerDataCollector::class)
+            ->tag('data_collector', [
+                'template' => '@WebProfiler/Collector/serializer.html.twig',
+                'id' => 'serializer',
+            ])
+    ;
+};