By Toby Sterling and Nadine Schimroszik AMSTERDAM (Reuters) – The grocery delivery industry that erupted in the depths of lockdown is facing a painful period of adjustment that investors say is likely to see only a handful of firms survive in each market – and then, in very different shape. As the COVID-19 pandemic kept consumers behind closed doors, investors poured billions into “quick commerce” grocery firms that pledged to deliver products from pasta to soap powder within 15 minutes from bespoke hubs known as dark stores. But with lockdowns easing, consumers struggling with soaring costs o…