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/cache.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="M2.3 6l9-4.6a1.5 1.5 0 0 1 1.4 0l9 4.7a1.5 1.5 0 0 1 0 2.6l-9 4.7a1.5 1.5 0 0 1-1.4 0l-9-4.7a1.5 1.5 0 0 1 0-2.6zm18.3 5L12 15.4 3.4 11a1.4 1.4 0 0 0-1.2 2.4l9.2 4.8a1.4 1.4 0 0 0 1.2 0l9.2-4.8a1.4 1.4 0 0 0-1.3-2.4zm0 4.5L12 19.9l-8.6-4.4a1.4 1.4 0 0 0-1.2 2.4l9.2 4.7a1.4 1.4 0 0 0 1.2 0l9.2-4.7a1.4 1.4 0 0 0-1.3-2.5z"/></svg>
+<svg xmlns="http://www.w3.org/2000/svg" data-icon-name="icon-tabler-stack-2" 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>Cache</title>
+    <path stroke="none" d="M0 0h24v24H0z" fill="none"></path>
+    <polyline points="12 4 4 8 12 12 20 8 12 4"></polyline>
+    <polyline points="4 12 12 16 20 12"></polyline>
+    <polyline points="4 16 12 20 20 16"></polyline>
+</svg>