The Gilded-Age-themed 2022 Met Gala is tonight, not quite eight months after the 2021 Met Gala, which COVID-19 delayed to September from May. The Metropolitan Museum of Art’s Costume Institute and Vogue’s editor-in-chief Anna Wintour — the gala’s chair since 1999 — worked with the pandemic-skewed calendar by creating a two-part exhibition. Tonight’s gala celebrates…