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/config/Definition/Builder/BooleanNodeDefinition.php

@@ -21,9 +21,6 @@ use Symfony\Component\Config\Definition\Exception\InvalidDefinitionException;
  */
 class BooleanNodeDefinition extends ScalarNodeDefinition
 {
-    /**
-     * {@inheritdoc}
-     */
     public function __construct(?string $name, NodeParentInterface $parent = null)
     {
         parent::__construct($name, $parent);
@@ -33,20 +30,16 @@ class BooleanNodeDefinition extends ScalarNodeDefinition
 
     /**
      * Instantiate a Node.
-     *
-     * @return BooleanNode
      */
-    protected function instantiateNode()
+    protected function instantiateNode(): BooleanNode
     {
         return new BooleanNode($this->name, $this->parent, $this->pathSeparator);
     }
 
     /**
-     * {@inheritdoc}
-     *
      * @throws InvalidDefinitionException
      */
-    public function cannotBeEmpty()
+    public function cannotBeEmpty(): static
     {
         throw new InvalidDefinitionException('->cannotBeEmpty() is not applicable to BooleanNodeDefinition.');
     }