By Akash Sriram and Abhirup Roy (Reuters) -Rivian Automotive surpassed third-quarter revenue expectations on Tuesday, fueled by strong deliveries as U.S. consumers rushed to grab a federal tax incentive on electric vehicle purchases before its expiry. Shares of the Irvine, California-based company rose more than 4% after the bell. The company said last month it delivered 13,201 vehicles in the third quarter, up 32% from the year earlier, but lowered the mid point of its full-year forecast marginally to ...