fix and bringing to a unified style warnings of server loading logs to be more visible at server startup (#10970)

src/server/game/Movement/Waypoints/WaypointMgr.cpp

@@ -52,7 +52,7 @@ void WaypointMgr::Load()
 
     if (!result)
     {
-        LOG_ERROR("sql.sql", ">> Loaded 0 waypoints. DB table `waypoint_data` is empty!");
+        LOG_WARN("server.loading", ">> Loaded 0 waypoints. DB table `waypoint_data` is empty!");
         LOG_INFO("server.loading", " ");
         return;
     }