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/Loader/Configurator/Traits/ConfiguratorTrait.php

@@ -11,16 +11,16 @@
 
 namespace Symfony\Component\DependencyInjection\Loader\Configurator\Traits;
 
+use Symfony\Component\DependencyInjection\Loader\Configurator\ReferenceConfigurator;
+
 trait ConfiguratorTrait
 {
     /**
      * Sets a configurator to call after the service is fully initialized.
      *
-     * @param string|array $configurator A PHP callable reference
-     *
      * @return $this
      */
-    final public function configurator($configurator): self
+    final public function configurator(string|array|ReferenceConfigurator $configurator): static
     {
         $this->definition->setConfigurator(static::processValue($configurator, true));