It’s mere coincidence George Clooney resembles Santa and dwells atop the North Pole while on a not-so-jolly journey to the ends of the Earth in “The Midnight Sky.” So don’t be fooled by the long gray beard and icebox setting for a dour end of the world mopefest in which it’s 2049 and climate change is killing off all the girls and boys, both naughty and nice. Father Christmas his oddly named Augustine is not. He’s actually a celebrated astronomer fed up with his fellow humans, who he rightly credits with failing “to do our job” in protecting the planet from self destruction.