By Aditya Soni, Noel Randewich and Rae Wee (Reuters) -Nvidia’s quarterly outlook on Wednesday suggested demand from Microsoft, Amazon and other heavyweight tech companies racing to build out AI infrastructure remains robust, though the outcome failed to significantly quell fears of overspending in the booming industry. Shares of Nvidia fell 1.5% in extended trade, trimming some of its 3.7% gain