CHARLOTTE, N.C. — NASCAR is requiring Cup driver and 23XI Racing co-owner Denny Hamlin to complete sensitivity training after Hamlin tweeted a racist joke targeted at competitor Kyle Larson. Hamlin on Monday tweeted a 10-second clip from the cartoon television series Family Guy that stereotypes Asian drivers. The name “Kyle Larson” appeared over the driver in the cartoon. Larson is half-Japanese. The clip was then edited to show the finish of Sunday’s race at Talladega Superspeedway, in which Larson moved up a lane while driving his No. 5 Chevrolet battling for the win approaching the start-fi…