fix(Scripts/RuinsOfAhnQiraj): Ossirian reset (#12548)

data/sql/updates/pending_db_world/rev_1658857216982492500.sql

@@ -0,0 +1,2 @@
+--
+UPDATE `creature_template` SET `flags_extra` = `flags_extra`|0x80000000 WHERE `entry` = 15339;

src/server/scripts/Kalimdor/RuinsOfAhnQiraj/boss_ossirian.cpp

@@ -168,6 +168,11 @@ struct boss_ossirian : public BossAI
         {
             crystal->Use(me);
         }
+
+        std::list<Creature*> vortexes;
+        me->GetCreaturesWithEntryInRange(vortexes, 200.f, NPC_SAND_VORTEX);
+        for (Creature* vortex : vortexes)
+            vortex->DespawnOrUnsummon();
     }
 
     void SpawnNextCrystal()