The jury is still out on whether American culture, or the music industry, can create another superstar, like Michael Jackson or Prince, like Madonna or Bruce Springsteen. Maybe Beyoncé, now 42 years old, and Taylor Swift, 34, are the last of their kind. But if future superstars are still possible, one of its more likely candidates — Chappell Roan — played at College Street Music Hall on Wednesday night to an ecstatic, sold-out crowd that couldn’t get enough.