A Doordash delivery bag is seen in Brooklyn, New York City, U.S., May 9, 2022. REUTERS/Andrew Kelly/File Photo Purchase Licensing Rights, opens new tabAug 6 (Reuters) - DoorDash (DASH.O), opens new tab forecast third-quarter gross merchandise value above Wall Street expectations after topping estimates on Wednesday, betting on robust demand for food and grocery deliveries through its platform.The company's offers and promotions, particularly in its U.S. and international markets for members, hav...