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/search.svg

@@ -1 +1,5 @@
-<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24"><path fill="#AAA" d="M11.6.4A8 8 0 0 0 5.2 13L.8 17.5a1.3 1.3 0 0 0-.4.9c0 .3.1.6.4.9s.5.3.9.3c.3 0 .6 0 .9-.3l4.3-4.5a7.9 7.9 0 0 0 4.7 1.5 8 8 0 0 0 0-16zm5.5 8a5.5 5.5 0 0 1-5.5 5.4 5.5 5.5 0 1 1 5.5-5.5z"/></svg>
+<svg xmlns="http://www.w3.org/2000/svg" data-icon-name="icon-tabler-search" 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="10" cy="10" r="7"></circle>
+    <line x1="21" y1="21" x2="15" y2="15"></line>
+</svg>