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/alert-circle.svg

@@ -0,0 +1,6 @@
+<svg xmlns="http://www.w3.org/2000/svg" data-icon-name="icon-tabler-alert-circle" 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>
+    <circle cx="12" cy="12" r="9"></circle>
+    <line x1="12" y1="8" x2="12" y2="12"></line>
+    <line x1="12" y1="16" x2="12.01" y2="16"></line>
+</svg>