NEW YORK — Fashion’s biggest night out was also a big night for reflection. Dwyane Wade and Gabrielle Union paid a touching tribute to their 14-year-old daughter, Zaya, at the Met Gala on Monday night, while also sharing powerful words of advice for other parents of trans kids. The power couple’s fashion turned heads as they entered the celebrity-packed fund-raiser benefitting the Metropolitan Museum of Art’s Costume Institute: Union, 49, stunned in a silver sequin Versace number with a long feathered train and a massive flower accent around her waist; while Wade, 40, wore a white blazer, whit…
