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/console/CommandLoader/CommandLoaderInterface.php

@@ -22,21 +22,17 @@ interface CommandLoaderInterface
     /**
      * Loads a command.
      *
-     * @return Command
-     *
      * @throws CommandNotFoundException
      */
-    public function get(string $name);
+    public function get(string $name): Command;
 
     /**
      * Checks if a command exists.
-     *
-     * @return bool
      */
-    public function has(string $name);
+    public function has(string $name): bool;
 
     /**
      * @return string[]
      */
-    public function getNames();
+    public function getNames(): array;
 }