fix(Scripts/ZulAman): Move Harrison Jones spawn to DB (#20491)

Co-authored-by: Benjamin Jackson <38561765+heyitsbench@users.noreply.github.com>

data/sql/updates/pending_db_world/rev_1731165151168533600.sql

@@ -0,0 +1,4 @@
+--
+DELETE FROM `creature` WHERE `guid` = 320 AND `id1` = 24358;
+INSERT INTO `creature` (`guid`, `id1`, `id2`, `id3`, `map`, `zoneId`, `areaId`, `spawnMask`, `phaseMask`, `equipment_id`, `position_x`, `position_y`, `position_z`, `orientation`, `spawntimesecs`, `wander_distance`, `currentwaypoint`, `curhealth`, `curmana`, `MovementType`, `npcflag`, `unit_flags`, `dynamicflags`, `ScriptName`, `VerifiedBuild`, `CreateObject`, `Comment`) VALUES
+(320, 24358, 0, 0, 568, 0, 0, 1, 1, 0, 121.36404, 1674.9835, 42.10491, 1.553343057632446289, 608400, 0, 0, 4890, 0, 2, 1, 0, 0, 'npc_harrison_jones', 50375, 2, NULL);

src/server/scripts/EasternKingdoms/ZulAman/instance_zulaman.cpp

@@ -93,7 +93,6 @@ public:
         ObjectGuid AshlisBagGUID;
         ObjectGuid KrazsPackageGUID;
         ObjectGuid StrangeGongGUID;
-        ObjectGuid HarrisonJonesGUID;
 
         ObjectGuid HexLordGateGUID;
         ObjectGuid ZulJinGateGUID;
@@ -129,25 +128,6 @@ public:
             m_auiEncounter[DATA_GONGEVENT] = NOT_STARTED;
         }
 
-        void OnPlayerEnter(Player* /*player*/) override
-        {
-            if (!HarrisonJonesGUID)
-                instance->SummonCreature(NPC_HARRISON_JONES, HarrisonJonesLoc);
-        }
-
-        void OnCreatureCreate(Creature* creature) override
-        {
-            switch (creature->GetEntry())
-            {
-                case NPC_HARRISON_JONES:
-                    HarrisonJonesGUID = creature->GetGUID();
-                    break;
-                default:
-                    break;
-            }
-            InstanceScript::OnCreatureCreate(creature);
-        }
-
         void OnGameObjectCreate(GameObject* go) override
         {
             switch (go->GetEntry())