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/routing/Matcher/RequestMatcherInterface.php

@@ -29,11 +29,9 @@ interface RequestMatcherInterface
      * If the matcher cannot find information, it must throw one of the exceptions documented
      * below.
      *
-     * @return array
-     *
      * @throws NoConfigurationException  If no routing configuration could be found
      * @throws ResourceNotFoundException If no matching resource could be found
      * @throws MethodNotAllowedException If a matching resource was found but the request method is not allowed
      */
-    public function matchRequest(Request $request);
+    public function matchRequest(Request $request): array;
 }