NEW DELHI — It started as an elite political conversation in an English country house to rein in this generation’s most powerful technology. Now it’s a business dealmaking free-for-all in an Indian megacity.  The annual global artificial intelligence summit, which takes place in New Delhi this week, has grown from 150 to 35,000 delegates in less than three years. In the process, the original motivation for the summit — as a global conversation to agree on safeguards to keep AI technology in