ASSOCIATED PRESS; Tyler Le/BI Three years ago, Satya Nadella catapulted Microsoft to the front of the AI race and became "like a superhero," one recent former Microsoft executive said.In February 2023, after betting early on OpenAI, the CEO unveiled Microsoft's AI-powered Bing search engine before a packed audience outside Seattle, and declared a war on Google's search dominance. "A race starts today," he said. Waves of adulation followed. When Nadella helped navigate OpenAI's board crisis later...