Move Debug Trajectory

[Lecrapouille]

Renderer.cpp: void Renderer::draw(Car const& car, ... the following code

    if (car.isEgo() && car.hasECU<AutoParkECU>())
    {
        AutoParkECU const& ecu = car.getECU<AutoParkECU>();
        if (ecu.hasTrajectory())
        {
            ecu.trajectory().draw(target, states);
        }
    }

is not the best place to be called:

• Concrete ECU (such as AutoParkECU) shall be known.
• Shall we had virtual void ECU::draw() = 0 ?