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/web-profiler-bundle/Resources/views/Icon/close.svg

@@ -1 +1,5 @@
-<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24"><path fill="#AAA" d="M21.1 18.3c.8.8.8 2 0 2.8-.4.4-.9.6-1.4.6s-1-.2-1.4-.6L12 14.8l-6.3 6.3c-.4.4-.9.6-1.4.6s-1-.2-1.4-.6a2 2 0 0 1 0-2.8L9.2 12 2.9 5.7a2 2 0 0 1 0-2.8 2 2 0 0 1 2.8 0L12 9.2l6.3-6.3a2 2 0 0 1 2.8 0c.8.8.8 2 0 2.8L14.8 12l6.3 6.3z"/></svg>
+<svg xmlns="http://www.w3.org/2000/svg" data-icon-name="icon-tabler-x" width="24" height="24" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round">
+    <path stroke="none" d="M0 0h24v24H0z" fill="none"></path>
+    <line x1="18" y1="6" x2="6" y2="18"></line>
+    <line x1="6" y1="6" x2="18" y2="18"></line>
+</svg>