By Anthony Boadle BRASILIA (Reuters) – Brazilian leftist leader Luiz Inacio Lula da Silva won a third presidential term on Sunday in a remarkable comeback for the country’s first working class president, whose storied political career nearly ended in prison. A former metalworker born to illiterate farm hands, Lula has been the most central figure in Brazilian politics for four decades, since leading labor union strikes against a military dictatorship in the 1980s and forming the leftist Workers Party. Lula called his victory over far-right President Jair Bolsonaro by a tight margin in a runoff…