When Ryan Gosling and Emily Blunt paired up on stage at the Oscars this year, millions around the world cooed as one, instantly smitten with these two as romantic-comic screen partners. So deft; so sly; so free and easy on the draw, as the Lucky Strike ads used to say. Give those two charmers a movie! They did. They already had. And now it’s here: “The Fall Guy,” which comes perilously close to sidelining its own headliners in favor of bone-crunching mayhem, especially in the second, less fun half. Still, it’s entertaining enough for all normal moviegoing purposes. Funny, sometimes. Laden, alw…