Iran’s two-time Oscar winner, director Asghar Farhadi, gave a lengthy rebuttal of claims that he plagiarised his 2021 movie “A Hero” on Tuesday in Cannes. The 50-year-old director is part of the jury for the world’s top film festival, a year after “A Hero” won its second-place Grand Prix. It emerged last month that Farhadi faces trial in Iranafter a former student accused him of stealing the idea for the film, which follows an Iranian convict who gains fame after finding a purse of gold coins and tracking down its owner rather than keeping it for himself. But Farhadi said both the student’s do…