Investments in artificial intelligence by Alphabet Inc.’s Google, Apple Inc., and Microsoft Corp. warrant deeper scrutiny from the UK’s antitrust watchdog over concerns they are being leveraged to further entrench their market power.The Competition and Markets Authority said Thursday it has uncovered an “interconnected web” of partnerships and investments within AI involving a handful of the same tech firms, that may allow them “to shape these markets in their own interests.” Meta Platforms Inc....