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/ajax.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="M9.8 18L6 22.4c-.3.3-.8.4-1.1 0L1 18c-.4-.5-.1-1 .5-1H3V6.4C3 3.8 5.5 2 8.2 2h3.9c1.1 0 2 .9 2 2s-.9 2-2 2H8.2C7.7 6 7 6 7 6.4V17h2.2c.6 0 1 .5.6 1zM23 6l-3.8-4.5a.8.8 0 0 0-1.1 0L14.2 6c-.4.5-.1 1 .5 1H17v10.6c0 .4-.7.4-1.2.4h-3.9c-1.1 0-2 .9-2 2s.9 2 2 2h3.9c2.6 0 5.2-1.8 5.2-4.4V7h1.5c.6 0 .9-.5.5-1z"/></svg>
+<svg xmlns="http://www.w3.org/2000/svg" data-icon-name="icon-tabler-arrows-down-up" 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="17" y1="3" x2="17" y2="21"></line>
+    <path d="M10 18l-3 3l-3 -3"></path>
+    <line x1="7" y1="21" x2="7" y2="3"></line>
+    <path d="M20 6l-3 -3l-3 3"></path>
+</svg>