Core/Combat: Fixed combat after remove charm

Port From (https://github.com/TrinityCore/TrinityCore/commit/4ed918fcb38d7fd3752899a0eafd7ad62b7217af)

Source/Game/Combat/CombatManager.cs

@@ -235,6 +235,27 @@ namespace Game.Combat
                 _pveRefs.First().Value.EndCombat();
         }
 
+        public void RevalidateCombat()
+        {
+            foreach(var (guid, refe) in _pveRefs.ToList())
+            {
+                if (!CanBeginCombat(_owner, refe.GetOther(_owner)))
+                {
+                    _pveRefs.Remove(guid); // erase manually here to avoid iterator invalidation
+                    refe.EndCombat();
+                }
+            }
+
+            foreach (var (guid, refe) in _pvpRefs.ToList())
+            {
+                if (!CanBeginCombat(_owner, refe.GetOther(_owner)))
+                {
+                    _pvpRefs.Remove(guid); // erase manually here to avoid iterator invalidation
+                    refe.EndCombat();
+                }
+            }
+        }
+
         void EndAllPvPCombat()
         {
             while (!_pvpRefs.Empty())

Source/Game/Entities/Unit/Unit.Pets.cs

@@ -481,6 +481,7 @@ namespace Game.Entities
             Cypher.Assert(type != CharmType.Vehicle || (IsTypeId(TypeId.Unit) && IsVehicle()));
 
             charmer.SetCharm(this, false);
+            m_combatManager.RevalidateCombat();
 
             Player playerCharmer = charmer.ToPlayer();
             if (playerCharmer)