For anyone who grew up with SCTV, it’s been incredibly heartening to see Eugene Levy and Catherine O’Hara hit stardom in their winter years thanks to “Schitt’s Creek.” Everyone who grew up with them knew they were superstars; it’s only that the world discovered them much, much later. Regardless, the success of that show has launched them both, and for Levy, it’s spawned his own travelogue show, “The Reluctant Traveler With Eugene Levy,” centered on his lifelong disinclination to travel and leave the comfort of his home.