SANTA CLARA, Calif. — No position group raises more questions this 49ers training camp than their offensive line. Sure, quarterback Trey Lance draws the most hype, Deebo Samuel the most drama, and Jimmy Garoppolo the most bewildering existence, but offensive line is seen as this team’s weak link. Is it? “Our room has a bunch of athletes, guys who are not just big and can move people, but can actually move their own bodies into space,” left guard Aaron Banks said. Ah, but who’ll snap the ball to Lance? How are the young guards, Banks and Spencer Burford? Is Mike McGlinchey all the way back? Tho…