Big legacy U.S. and European automakers are frantically dialing back their electric vehicle bets, scaling back once-hyped roadmaps to full electrification as demand for these vehicles implodes. The latest automaker to reverse course is not a mass-market sedan or SUV maker, but a luxury supercar brand: Lamborghini. CEO Stephan Winkelmann told the UK's The Sunday Times that he has ended plans to build EVs, saying customers are not seeking quiet supercars and that demand has collapsed. Winkelmann said that EV development risked becoming…