Snapping a photo of $2-million-plus Bugatti Chiron, Steven Bearden couldn’t get enough of the bevy of super-luxury cars herded into a ballroom Saturday night at Cobo Center. “I feel like the kids visiting Willy Wonka’s factory,” he said as scores of upscale partygoers ogling cars that ranged from the new Rolls-Royce Phantom to a pair of Ferraris. About 800 people crammed into the hall for the annual event called the Gallery ahead of the opening of the North American International Auto Show. . .