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/http-client.svg

@@ -1 +1,9 @@
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+    <path stroke="none" d="M0 0h24v24H0z" fill="none"></path>
+    <path d="M5.931 6.936l1.275 4.249m5.607 5.609l4.251 1.275"></path>
+    <path d="M11.683 12.317l5.759 -5.759"></path>
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+    <circle cx="18.5" cy="5.5" r="1.5"></circle>
+    <circle cx="18.5" cy="18.5" r="1.5"></circle>
+    <circle cx="8.5" cy="15.5" r="4.5"></circle>
+</svg>