Welcome back to television, Raylan Givens. Given that it is in a hero’s nature to return, and the medium’s to encourage that when it seems profitable, the appearance of “Justified: City Primeval,” this week on FX — eight years after Timothy Olyphant hung up his Stetson as the star of the original series, developed by Graham Yost from an Elmore Leonard short story — feels, if not inevitable … well…