Bradley Cooper as Leonard Bernstein and Carey Mulligan as Bernstein’s wife, Felicia Montealegre, in ‘Maestro.’Jason McDonald/Netflix Scott Malia, College of the Holy Cross Should actors and actresses who go to extremes to prepare for their roles get more love from Oscars voters? This year, best actor nominees Cillian Murphy, who played nuclear physicist J. Robert Oppenheimer in “Oppenheimer,” and Bradley Cooper, who starred as Leonard Bernstein in the biopic “Maestro,” are getting lots of buzz not only for their performances but also for how those performances were achieved. The already slim M…