NEW YORK — In nominations announced Wednesday, the 24th Screen Actors Guild Awards heartily endorsed the Frances McDormand-led revenge drama “Three Billboards Outside Ebbing, Missouri,” and offered swift redemption for the Golden Globes-overlooked romantic comedy “The Big Sick,” and left many Oscar favorites empty handed. Martin McDonaugh’s “Three Billboards” led all films with four nominations, including best ensemble, and acting nods for McDormand, Sam Rockwell and Woody Harrelson.