Nvidia CEO Jensen Huang. Tomohiro Ohsumi/Getty Images Jensen Huang is feeling spendy. In the span of a few weeks, the Nvidia CEO has committed billions to deals and investments — with more potentially right around the corner.The spending spree shows how far Nvidia is expanding beyond chips and raises a bigger question: how much of the AI ecosystem does it want a hand in?Nvidia said in its earnings report on Wednesday that it has $18 billion committed to equity investments for the rest of the fis...