Alibaba's U.S. IPO in 2014 is still the country's largest, raising $25 billion. But a fight between the U.S. and China over auditing may kick the e-commerce giant out of Wall Street. Almost eight years ago, Alibaba founder Jack Ma watched as eight of his customers rang the opening bell at the New York Stock Exchange, marking the first trading day for the Chinese e-commerce company. Alibaba had just completed the world’s largest IPO at the time, raising $25 billion at $68 a share. One trader told Fortune at the time that he’d “never seen anything” like the hype that…