NEW YORK (AP) — Lea Michele was just a kid actor backstage at the Imperial Theatre on Broadway when she first heard a song from the musical “Chess” on a stereo. Some three decades later, she finds herself singing that same tune in the same theater. The “Glee” and Broadway veteran, who got her professional start in “Les Misérables” at age 8, has returned, now a mother and a bankable star, to her old stomping grounds, which coincidentally is the very theater where “Chess” made its debut in 1988. “