By Jamie Roberts & Emma Wilson Ryan Gosling took a brutal swipe at Barbie rivals Oppenheimer as he presented an Oscar Award alongside Emily Blunt. The pair, whose hit movies go up against each other in a number of categories at the 96th Academy Awards, took aim at each other with Ryan blasting Oppenheimer for riding on “Barbie’s coattails”. As the pair paid tribute to all the stunt performers in cinema history, Ryan jibed: “I figured out why they call it ‘Barbenheimer’ and they didn’t call it ‘Oppenbarbie.’ I think you guys are the tail end of that cause you were riding Barbie’s coattails all …