An Amazon Web Services data center in Manassas, Virginia.Photographer: Nathan Howard/BloombergGreen firms in the US have found something of a lifeline in artificial intelligence after being bogged down by high interest rates, shrinking funding and, more recently, President Donald Trump’s sharp rollback of support.Clean technology companies that have inked deals to support data centers have seen their stocks soar this year, outperforming the S&P 500. Nuclear power startup Oklo Inc.’s shares are u...