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/forward.svg

@@ -1 +1,6 @@
-<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24"><path fill="#aaa" d="M23.6 11l-6.5-6.6a1.2 1.2 0 0 0-2.1.9V9H1.4A1.8 1.8 0 0 0 0 10.8v2.6A1.6 1.6 0 0 0 1.4 15H15v3.7a1.2 1.2 0 0 0 2 1l6.7-6.8a1.3 1.3 0 0 0 0-1.8z"/></svg>
+<svg xmlns="http://www.w3.org/2000/svg" data-icon-name="icon-tabler-arrow-narrow-right" 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="5" y1="12" x2="19" y2="12"></line>
+    <line x1="15" y1="16" x2="19" y2="12"></line>
+    <line x1="15" y1="8" x2="19" y2="12"></line>
+</svg>