By Maria Caspani (Reuters) -Kristen Stewart rocked the Oscars red carpet in shorts and Timothee Chalamet went shirtless on Sunday as stars made a full-fledged return for Hollywood’s big night out after the seismic changes wrought by COVID-19. After last year’s smaller-than-usual affair held at a train station last year due to the pandemic, Sunday’s unbridled Oscars glamour at Los Angeles’ Dolby Theatre brought lots of pastel colors punctuated by bright splashes of gold. Jessica Chastain, a contender for the best actress statuette for her portrayal of American evangelist Tammy Faye Bakker, dazz…