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/dependency-injection/ContainerAwareInterface.php

@@ -15,11 +15,15 @@ namespace Symfony\Component\DependencyInjection;
  * ContainerAwareInterface should be implemented by classes that depends on a Container.
  *
  * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @deprecated since Symfony 6.4, use dependency injection instead
  */
 interface ContainerAwareInterface
 {
     /**
      * Sets the container.
+     *
+     * @return void
      */
-    public function setContainer(ContainerInterface $container = null);
+    public function setContainer(?ContainerInterface $container);
 }