Set realistic limits on how far the steering wheel / throttle can move in a given frame

We currently allow moving the steering wheel and accelerator across their entire range in one frame which is not realistic. More here https://github.com/deepdrive/deepdrive-2d/blob/d4d8fcc40842cffb7473663e1181394ac947061d/deepdrive_2d/envs/agent.py#L1048-L1050 