By Evan Bleier Driving the #54 Skittles Gummies Toyota last May in NASCAR’s debut at the Circuit of the Americas (COTA) in Austin, Kyle Busch tasted the rainbow as well as victory by winning the Xfinity Series Pit Boss 250. The leader in 35 of 46 laps in his 98 career series victory, the Las Vegas native was able to navigate the 3.426-mile racetrack, which has become an annual stop for Formula 1, IndyCar and other racing series since it opened in 2012, with precision even though the 20-turn road course is vastly different than the oversized oval speedways that NASCAR typically uses. How’d he d…