Fix fleeing speed to 66% run speed

Port From (https://github.com/TrinityCore/TrinityCore/commit/d095d4afe95125bba64312025528a2c4aab157e0)

Source/Game/Movement/Generators/HomeMovement.cs

@@ -36,6 +36,8 @@ namespace Game.AI
             RemoveFlag(MovementGeneratorFlags.InitializationPending | MovementGeneratorFlags.Deactivated);
             AddFlag(MovementGeneratorFlags.Initialized);
 
+            owner.SetNoSearchAssistance(false);
+
             SetTargetLocation(owner);
         }
 

Source/Game/Movement/Generators/PointMovement.cs

@@ -185,7 +185,7 @@ namespace Game.Movement
 
     public class AssistanceMovementGenerator : PointMovementGenerator<Creature>
     {
-        public AssistanceMovementGenerator(uint id, float x, float y, float z, float speed = 0.0f) : base(id, x, y, z, true, speed) { }
+        public AssistanceMovementGenerator(uint id, float x, float y, float z) : base(id, x, y, z, true) { }
 
         public override void Finalize(Unit owner, bool active, bool movementInform)
         {

Source/Game/Movement/MotionMaster.cs

@@ -914,12 +914,15 @@ namespace Game.Movement
 
         public void MoveSeekAssistance(float x, float y, float z)
         {
-            if (_owner.IsCreature())
+            Creature creature = _owner.ToCreature();
+            if (creature != null)
             {
-                _owner.AttackStop();
-                _owner.CastStop();
-                _owner.ToCreature().SetReactState(ReactStates.Passive);
-                Add(new AssistanceMovementGenerator(EventId.AssistMove, x, y, z, _owner.GetSpeed(UnitMoveType.Run) * 0.66f));
+                Log.outDebug(LogFilter.Movement, $"MotionMaster::MoveSeekAssistance: '{creature.GetGUID()}', seeks assistance (X: {x}, Y: {y}, Z: {z})");
+                creature.AttackStop();
+                creature.CastStop();
+                creature.DoNotReacquireSpellFocusTarget();
+                creature.SetReactState(ReactStates.Passive);
+                Add(new AssistanceMovementGenerator(EventId.AssistMove, x, y, z));
             }
             else
                 Log.outError(LogFilter.Server, $"MotionMaster::MoveSeekAssistance: {_owner.GetGUID()}, attempted to seek assistance");

Source/Game/Movement/MoveSplineInit.cs

@@ -122,6 +122,10 @@ namespace Game.Movement
                     moveFlagsForSpeed &= ~MovementFlag.Walking;
 
                 args.velocity = unit.GetSpeed(SelectSpeedType(moveFlagsForSpeed));
+                Creature creature = unit.ToCreature();
+                if (creature != null)
+                    if (creature.HasSearchedAssistance())
+                        args.velocity *= 0.66f;
             }
 
             // limit the speed in the same way the client does