KANSAS CITY, Mo. — Long before the worlds-colliding juxtaposition of Chiefs tight end Travis Kelce hosting Saturday Night Live last year, quarterback Patrick Mahomes knew all too well the place the show held in the life of his friend and treasured target. Mahomes knew it was a dream of Kelce’s to merely appear on SNL because he spoke so often of the show and specific skits — including many that reflected the six-year-age difference between them. “He was always telling me (about) ones from before I was even born, and I’m like, ‘Trav, I’m not the same age as you, dude, I don’t know what that is,…