Core/Creatures: Moved autoattack handling from scripts to game

Port From (https://github.com/TrinityCore/TrinityCore/commit/605e5f94c0d71cad8e83fa5a07eaec4e6bed9cc3)

Source/Scripts/World/EmeraldDragons.cs

@@ -134,8 +134,6 @@ namespace Scripts.World.Achievements
             Unit target = SelectTarget(SelectTargetMethod.MaxThreat, 0, -50.0f, true);
             if (target != null)
                 DoCast(target, SpellIds.SummonPlayer);
-
-            DoMeleeAttackIfReady();
         }
     }
 

Source/Scripts/World/NpcGuard.cs

@@ -107,12 +107,9 @@ namespace Scripts.World.NpcGuard
                     {
                         me.ResetAttackTimer();
                         DoCastVictim(spellInfo.Id);
-                        meleeContext.Repeat();
                         return;
                     }
                 }
-                me.AttackerStateUpdate(victim);
-                me.ResetAttackTimer();
                 meleeContext.Repeat();
             }).Schedule(TimeSpan.FromSeconds(5), spellContext =>
             {
@@ -183,7 +180,7 @@ namespace Scripts.World.NpcGuard
             if (!UpdateVictim())
                 return;
 
-            _scheduler.Update(diff, DoMeleeAttackIfReady);
+            _scheduler.Update(diff);
         }
 
         void ScheduleVanish()

Source/Scripts/World/NpcsSpecial.cs

@@ -207,8 +207,7 @@ namespace Scripts.World.NpcsSpecial
                     ResetFlagTimer -= diff;
             }
 
-            if (UpdateVictim())
-                DoMeleeAttackIfReady();
+            UpdateVictim();
         }
 
         public override void ReceiveEmote(Player player, TextEmotes emote)