NEW YORK — After more than 16 years and nearly 2,600 telecasts, Jon Stewart can feel proud of his scads of Emmys and his pair of Peabody Awards, his cultural gravitas (he hung with the Prez, both on and off the air!), even his reprobate status at Fox News.Who could blame him for wanting to depart “The Daily Show” on this high note?Besides, maybe it had gotten too easy.By June, when Donald Trump jumped into the presidential race, a giddy Stewart framed this jest-alluring candidacy as Trump’s going …