If you’re producing an awards show and you’re running short as you head into the final category of the evening — this is a thing that has never happened before, so it’s a strange hypothetical — it must be a blessing to have Matthew McConaughey and Woody Harrelson as your last presenters. The longtime pals, collaborators and possible siblings have an undeniable rapport and a total lack of shame. So if you tell them, “Go out there and vamp,” they’re more than capable of babbling incoherently for five or 10 minutes, and there’s almost no risk that they’re going to wake up in the morning and feel any regrets or have any memories of what they…