Bob Odenkirk may be saying goodbye to Saul Goodman, but he’s not done just yet. AMC has greenlit and fast-tracked a new series, “Straight Man,” starring Odenkirk to premiere next year, the network announced Wednesday. He played fan favorite Goodman in “Breaking Bad” before starring as the protagonist of its spin-off “Better Call Saul.” Based on the novel of the same name by Pulitzer Prize-winning author Richard Russo, “Straight Man” is “a mid-life crisis tale set at Railton College, told in the first person by William Henry Devereaux, Jr. (Odenkirk), the unlikely chairman of the English depart…