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/twig.svg

@@ -1 +1,7 @@
-<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24"><path fill="#AAA" d="M8.932 22.492c.016-6.448-.971-11.295-5.995-11.619 4.69-.352 7.113 2.633 9.298 6.907C12.205 6.354 9.882 1.553 4.8 1.297c7.433.07 10.028 5.9 11.508 14.293 1.171-2.282 3.56-5.553 5.347-1.361-1.594-2.04-3.607-1.617-3.978 8.262H8.933z"/></svg>
+<svg xmlns="http://www.w3.org/2000/svg" data-icon-name="icon-tabler-seeding" width="24" height="24" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round" role="img">
+    <title>Twig</title>
+    <path stroke="none" d="M0 0h24v24H0z" fill="none"></path>
+    <path d="M12 10a6 6 0 0 0 -6 -6h-3v2a6 6 0 0 0 6 6h3"></path>
+    <path d="M12 14a6 6 0 0 1 6 -6h3v1a6 6 0 0 1 -6 6h-3"></path>
+    <line x1="12" y1="20" x2="12" y2="10"></line>
+</svg>