On a 55-acre track in Oshawa, Ont., the future of driving is taking shape, one line of code at a time. A test vehicle hits the pavement with software and hardware working together, after both have been pushed through models, simulations, and lab work to get here. It’s a big moment–one Sahar Kokaly, a software engineering manager at GM Canada, calls taking the “code to the road.” It’s also a glimpse of a much larger change sweeping the auto ind…