Use CarAIWaypointbased for data generation

[tsigalko18]

Manually driving the car w/ the arrow keys is challenging. One way to alleviate this problem and produce a more reliable ground truth is to include the CarAIWaypointbased prefab in the Training scenes and use that during the data generation phase. The car is designed to follow the waypoints, even though tuning of the hyperparameters is probably required for each track.