Ramin Setoodeh New York Bureau ChiefIn 2018, I interviewed Chadwick Boseman and Ryan Coogler for the cover of Variety, a few weeks before “Black Panther” opened in theaters.At the time, neither of them knew that the Marvel movie — the first studio superhero film with a Black director and mostly Black cast — would shatter box office records, grossing $1.4 billion worldwide.At our photo shoot that afternoon, at Griffith Park in Los Angeles, Boseman climbed on a boulder in his socks, as a Disney