fix(DB/Gameobject): Preserved Threshadon Carcass should be despawned before the event. (#10543)

Fixed #10449

data/sql/updates/pending_db_world/rev_1644076677748626800.sql

@@ -0,0 +1,3 @@
+INSERT INTO `version_db_world` (`sql_rev`) VALUES ('1644076677748626800');
+
+UPDATE `gameobject` SET `spawntimesecs`=-180 WHERE `id`=169216;