Fix `DBAPI` relying on server core API instead of generic one

sources/Data/Database/DBAPI.uc

@@ -329,7 +329,7 @@ private function EraseAllPackageData(BaseText packageToErase)
     if (packageName == "") {
         return;
     }
-    game = _server.unreal.GetGameType();
+    game = __core().unreal_api().GetGameType();
     game.DeletePackage(packageName);
     //  Delete any leftover objects. This has to be done *after*
     //  `DeletePackage()` call, otherwise removed garbage can reappear.