“Is Tucson in Arizona?” John Lennon asked Paul McCartney as they worked out a hometown for Jojo in “The Beatles: Get Back” documentary. McCartney’s answer: “Yeah, it is, yeah – it’s where they make ‘High Chaparral’.” More than half a century later, Tucson’s vintage TV-Western identity lingers in the public imagination, and to be fair, this is still the kind of place where you’ll find working ranches, as many pickups as sedans, and citywide school closures during February’s Rodeo Break.