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/notifier_webhook.php

@@ -0,0 +1,21 @@
+<?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\Notifier\Bridge\Twilio\Webhook\TwilioRequestParser;
+
+return static function (ContainerConfigurator $container) {
+    $container->services()
+        ->set('notifier.webhook.request_parser.twilio', TwilioRequestParser::class)
+        ->alias(TwilioRequestParser::class, 'notifier.webhook.request_parser.twilio')
+    ;
+};