The last time I saw the actor Stacy Keach he was in New York on stage portraying an ex-cowboy movie star in “Other Desert Cities.” The next I heard was about his heart attack in spring 2017 that canceled his one-man show as Ernest Hemingway in “Pamplona” at Chicago’s Goodman Theatre.But, even at 77, Keach is a tough old guy, so I was not surprised that this veteran actor recently appeared in the world premiere of Jim McGrath’s play, as promised, in Goodman’s Owens Theatre through …