In the Academy’s Andrea Riseborough fracas, the loser is the actress herself. The respected 41-year-old British thespian (“Shadow Dancer,” “W.E.,” “Battle of the Sexes,” “Happy Go Lucky”) earned an Oscar nomination for a lauded performance as a down-and-out alcoholic in scrappy indie “To Leslie” (Momentum Pictures), but her name will also be remembered for her association with the grassroots awards push that upended the traditional Oscar campaigning process. While some champion the underdog success of “To Leslie,” others decry the methods deployed to achieve it.