Add delay model of velocity and steering

[kyoichi-sugahara]

Adding delay model of velocity and steering which reads velocity command as DELAY_STEER_VEL.
This model was used in autoware.iv as DELAY_STEER. And this model was not ported from autoware.iv.

autoware.universe/simulator/simple_planning_simulator/include/simple_planning_simulator/simple_planning_simulator_core.hpp

Lines 188 to 197 in 4dc308f

	/* vehicle model */
	enum class VehicleModelType
	{
	IDEAL_STEER_ACC = 0,
	IDEAL_STEER_ACC_GEARED = 1,
	DELAY_STEER_ACC = 2,
	DELAY_STEER_ACC_GEARED = 3,
	IDEAL_STEER_VEL = 4,
	DELAY_STEER_VEL = 5
	} vehicle_model_type_; //!< @brief vehicle model type to decide the model dynamics

[takayuki5168]

resolved by #235