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/twig-bundle/Resources/config/importmap.php

@@ -0,0 +1,27 @@
+<?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\Bridge\Twig\Extension\ImportMapExtension;
+use Symfony\Bridge\Twig\Extension\ImportMapRuntime;
+
+return static function (ContainerConfigurator $container) {
+    $container->services()
+
+        ->set('twig.runtime.importmap', ImportMapRuntime::class)
+            ->args([service('asset_mapper.importmap.renderer')])
+            ->tag('twig.runtime')
+
+        ->set('twig.extension.importmap', ImportMapExtension::class)
+            ->tag('twig.extension')
+    ;
+};