Veteran French filmmaker Catherine Breillat enjoyed her strongest U.S. debut thanks to a lusty response from New York audiences to “The Last Mistress,” a period drama featuring Asia Argento as a woman jealous of her younger lover’s plans to marry. “Last Mistress” earned a sizzling $33,554 for IFC Films from two debut runs in New York. “Trumbo,” director Peter Askin’s documentary about blacklisted screenwriter Dalton Trumbo, also debuted in the iWBOT top five, which ranks films by per-screen…