Change roles endpoint to /rest/data/user/roles - requires newest roundup

[rouilj]

In roundup 2.4.0 I added the rest endpoint /rest/data/user/roles. Make the classhelper use this for the roles
lookup. Diff:

--- classhelper.js      2024-05-21 19:17:49.490554548 -0400
+++ html/classhelper.js 2024-05-21 17:59:07.213953206 -0400
@@ -40,7 +40,7 @@
 const CLASSHELPER_TRANSLATION_KEYWORDS = ["apply", "cancel", "next", "prev", "search", "reset", CLASSHELPER_READONLY_POPUP_TITLE ];

 const ALTERNATIVE_DROPDOWN_PATHNAMES = {
-    "roles": "/rest/roles"
+    "roles": "/rest/data/user/roles"
 }

 /**