Ruben Santiago-Hudson has spent a large part of his career inside August Wilson’s world. He won a Tony Award for his performance in Seven Guitars, directed the Tony-winning revival of Jitney and wrote the screenplay for the film adaptation of Ma Rainey’s Black Bottom. Now he’s back onstage, playing Bynum Walker, the spiritual center of Joe Turner’s Come and Gone, at Broadway’s Ethel Barrymore Theatre. Direc…