Not since the early 20th century have there been so many startups in the U.S. auto industry.Add Phoenix, Ariz.-based Atlis Motor Vehicles to a growing list of electric-vehicle startups across the United States — Rivian Automotive, Nikola Corp., Lordstown Motors Corp. and Bollinger Motors among them — seeking to make their marks. The surge in 21st-century startups is inspired by the meteoric success of Silicon Valley EV-maker Tesla Inc. as well as government regulations that for the first time mandate the powertrains automakers must use.Upstart automaker Atlis Motor Vehicles is betting its Atli…