Core/Creatures: Allow flagging creatures to not clear their tap list when evading

Port From (https://github.com/TrinityCore/TrinityCore/commit/6e309ed17ff448b971f206c7ea7174c736230299)

Source/Game/AI/CoreAI/CreatureAI.cs

@@ -294,7 +294,10 @@ namespace Game.AI
 
             // sometimes bosses stuck in combat?
             me.CombatStop(true);
-            me.SetTappedBy(null);
+
+            if (!me.IsTapListNotClearedOnEvade())
+                me.SetTappedBy(null);
+            
             me.ResetPlayerDamageReq();
             me.SetLastDamagedTime(0);
             me.SetCannotReachTarget(false);

Source/Game/AI/ScriptedAI/ScriptedAI.cs

@@ -197,7 +197,10 @@ namespace Game.AI
             if (reset)
             {
                 who.LoadCreaturesAddon();
-                who.SetTappedBy(null);
+
+                if (!me.IsTapListNotClearedOnEvade())
+                    who.SetTappedBy(null);
+
                 who.ResetPlayerDamageReq();
                 who.SetLastDamagedTime(0);
                 who.SetCannotReachTarget(false);

Source/Game/AI/ScriptedAI/ScriptedEscortAI.cs

@@ -121,7 +121,9 @@ namespace Game.AI
         {
             me.RemoveAllAuras();
             me.CombatStop(true);
-            me.SetTappedBy(null);
+
+            if (!me.IsTapListNotClearedOnEvade())
+                me.SetTappedBy(null);
 
             EngagementOver();
 

Source/Game/Entities/Creature/Creature.Fields.cs

@@ -87,6 +87,7 @@ namespace Game.Entities
         internal Dictionary<ObjectGuid, Loot> m_personalLoot = new();
         public Loot _loot;
         HashSet<ObjectGuid> m_tapList = new();
+        bool m_dontClearTapListOnEvade;
     }
 
     public enum ObjectCellMoveState

Source/Game/Entities/Creature/Creature.cs

@@ -1205,6 +1205,15 @@ namespace Game.Entities
         {
             _lootId = lootId;
         }
+
+        public void SetDontClearTapListOnEvade(bool dontClear)
+        {
+            // only temporary summons are allowed to not clear their tap list
+            if (m_spawnId == 0)
+                m_dontClearTapListOnEvade = dontClear;
+        }
+
+        public bool IsTapListNotClearedOnEvade() { return m_dontClearTapListOnEvade; }
         
         public void SetTappedBy(Unit unit, bool withGroup = true)
         {