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/filesystem/Exception/IOException.php

@@ -20,7 +20,7 @@ namespace Symfony\Component\Filesystem\Exception;
  */
 class IOException extends \RuntimeException implements IOExceptionInterface
 {
-    private $path;
+    private ?string $path;
 
     public function __construct(string $message, int $code = 0, \Throwable $previous = null, string $path = null)
     {
@@ -29,10 +29,7 @@ class IOException extends \RuntimeException implements IOExceptionInterface
         parent::__construct($message, $code, $previous);
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    public function getPath()
+    public function getPath(): ?string
     {
         return $this->path;
     }