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/notifier.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="M11.23,4.8c-3,.83-5.07,3.18-5.07,5.9H7.39c0-2.21,1.77-4,4.17-4.72ZM7.49,0A12.22,12.22,0,0,0,0,11.59H2.07A10.14,10.14,0,0,1,8.23,2Zm8.24,2a10.14,10.14,0,0,1,6.16,9.64H24A12.24,12.24,0,0,0,16.47,0ZM4.41,15.64V10.7a7.57,7.57,0,0,1,15.14,0v4.94l3.3,4.4H1.11Zm4.45,5.3A3.06,3.06,0,0,0,11.92,24H12a3.07,3.07,0,0,0,3.07-3.06Z"/></svg>
+<svg xmlns="http://www.w3.org/2000/svg" data-icon-name="icon-tabler-bell-ringing" 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>
+    <path d="M10 5a2 2 0 0 1 4 0a7 7 0 0 1 4 6v3a4 4 0 0 0 2 3h-16a4 4 0 0 0 2 -3v-3a7 7 0 0 1 4 -6"></path>
+    <path d="M9 17v1a3 3 0 0 0 6 0v-1"></path>
+    <path d="M21 6.727a11.05 11.05 0 0 0 -2.794 -3.727"></path>
+    <path d="M3 6.727a11.05 11.05 0 0 1 2.792 -3.727"></path>
+</svg>