Vivian Beaumont Theater, New York The star makes a convincing Broadway debut in a tragicomic winner staged with thought and deft flashes of modernity As with Appropriate, another outstanding, claustrophobic family drama directed by Lila Neugebauer on Broadway this season, the new Broadway revival of Uncle Vanya, now playing at Lincoln Center, plays to the sound of oppressive heat. The trill of crickets, the buzz of c…