(Credit: Timothy White for Decca) Wearing a shiny taupe gown that reflected minimized images of the lights above, soprano Renée Fleming and pianist Gerald Martin Moore entered to applause that showed they have fans in this desert city. They opened with a Valentine befitting February 14th: George Frideric Handel’s enticing “Bel Piacere è Godere.” Fleming followed its fast, tricky coloratura {…}