"Barbie" has broken another record. Weeks after opening, Greta Gerwig's comedy based on the iconic toy has bested "The Dark Knight" to become Warner Bros. highest-grossing film ever at the North American box office. [readmore label="READ MORE: " link="https://etcanada.com/news/1013573/margot-robbie-to-earn-50-million-in-barbie-salary-and-bonuses-report/" text="Margot Robbie To Earn $50 Million In ‘Barbie’ Salary And Bonuses: Report " /] The blockbuster…