Theater review JOE TURNER'S COME AND GONE Two hours and 30 minutes, with one intermission. At the Barrymore Theatre, 243 West 47th Street. Almost without fail, the brilliance of August Wilson emerges even in mediocre stagings of his plays. That is the unshakable feeling at the revival of his “Joe Turner’s Come and Gone” that opened Saturday night at the Barrymore Theatre. You’re never less than pleased you’ve come, and yet you’re constantly aware that something’s gone. What thrives in director Debbie Allen’s production of one of the writer’s best works is the drama’s musical conversationality and boisterous spirit. How could it not when the 1911 Pittsburgh boarding house it’s set in is run by Cedric the Entertainer? He is smart casting for Seth, a sensible man who provides rooms at $2 a week for, broadly speaking, people in search of something: a missing wife, a job, a man. By design, the transient tenants with secrets are more intriguing than the steady proprietor.…