DEV: Avoid duplicating constant between client and server (#25179)

Why this change?

While the constant does not change very often, we should still avoid
duplicating the value of a constant used on the server side in the
client side to avoid the values going out of sync.

lib/tasks/javascript.rake

@@ -160,6 +160,8 @@ task "javascript:update_constants" => :environment do
     }
 
     export const AUTO_GROUPS = #{auto_groups.to_json};
+
+    export const MAX_NOTIFICATIONS_LIMIT_PARAMS = #{NotificationsController::INDEX_LIMIT};
   JS
 
   pretty_notifications = Notification.types.map { |n| "  #{n[0]}: #{n[1]}," }.join("\n")