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/http-kernel/Fragment/FragmentRendererInterface.php

@@ -24,17 +24,11 @@ interface FragmentRendererInterface
 {
     /**
      * Renders a URI and returns the Response content.
-     *
-     * @param string|ControllerReference $uri A URI as a string or a ControllerReference instance
-     *
-     * @return Response
      */
-    public function render($uri, Request $request, array $options = []);
+    public function render(string|ControllerReference $uri, Request $request, array $options = []): Response;
 
     /**
      * Gets the name of the strategy.
-     *
-     * @return string
      */
-    public function getName();
+    public function getName(): string;
 }