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/css-selector/Parser/Handler/HashHandler.php

@@ -29,8 +29,8 @@ use Symfony\Component\CssSelector\Parser\TokenStream;
  */
 class HashHandler implements HandlerInterface
 {
-    private $patterns;
-    private $escaping;
+    private TokenizerPatterns $patterns;
+    private TokenizerEscaping $escaping;
 
     public function __construct(TokenizerPatterns $patterns, TokenizerEscaping $escaping)
     {
@@ -38,9 +38,6 @@ class HashHandler implements HandlerInterface
         $this->escaping = $escaping;
     }
 
-    /**
-     * {@inheritdoc}
-     */
     public function handle(Reader $reader, TokenStream $stream): bool
     {
         $match = $reader->findPattern($this->patterns->getHashPattern());