Core/Units: Allow mind controlling non-controllable vehicles (for example players that become vehicle during boss encounters or creatures that only are vehicles to show non standard power type)

Port From (https://github.com/TrinityCore/TrinityCore/commit/d56d92fbe7436af00e00b00ca5e7640f852d3485)

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

@@ -278,7 +278,7 @@ namespace Game.Entities
                 charmer.RemoveAurasByType(AuraType.Mounted);
 
             Cypher.Assert(type != CharmType.Possess || charmer.IsTypeId(TypeId.Player));
-            Cypher.Assert((type == CharmType.Vehicle) == IsVehicle());
+            Cypher.Assert((type == CharmType.Vehicle) == (GetVehicleKit() && GetVehicleKit().IsControllableVehicle()));
 
             Log.outDebug(LogFilter.Unit, "SetCharmedBy: charmer {0} (GUID {1}), charmed {2} (GUID {3}), type {4}.", charmer.GetEntry(), charmer.GetGUID().ToString(), GetEntry(), GetGUID().ToString(), type);
 

Source/Game/Entities/Vehicle.cs

@@ -434,6 +434,15 @@ namespace Game.Entities
             return false;
         }
 
+        public bool IsControllableVehicle()
+        {
+            foreach (var itr in Seats)
+                if (itr.Value.SeatInfo.HasFlag(VehicleSeatFlags.CanControl))
+                    return true;
+
+            return false;
+        }
+        
         void InitMovementInfoForBase()
         {
             VehicleFlags vehicleFlags = (VehicleFlags)GetVehicleInfo().Flags;

Source/Game/Spells/Spell.cs

@@ -6786,7 +6786,7 @@ namespace Game.Spells
                 case AuraType.ModCharm:
                 case AuraType.ModPossessPet:
                 case AuraType.AoeCharm:
-                    if (target.IsTypeId(TypeId.Unit) && target.IsVehicle())
+                    if (target.GetVehicleKit() && target.GetVehicleKit().IsControllableVehicle())
                         return false;
                     if (target.IsMounted())
                         return false;