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/settings-theme-light.svg

@@ -0,0 +1,12 @@
+<svg xmlns="http://www.w3.org/2000/svg" data-icon-name="icon-tabler-sun-high" 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 d="M14.828 14.828a4 4 0 1 0 -5.656 -5.656a4 4 0 0 0 5.656 5.656z" />
+    <path d="M6.343 17.657l-1.414 1.414" />
+    <path d="M6.343 6.343l-1.414 -1.414" />
+    <path d="M17.657 6.343l1.414 -1.414" />
+    <path d="M17.657 17.657l1.414 1.414" />
+    <path d="M4 12h-2" />
+    <path d="M12 4v-2" />
+    <path d="M20 12h2" />
+    <path d="M12 20v2" />
+</svg>