PARK CITY, Utah — The sprint to the Sundance Festival stage along a jam-packed stretch of Main Street is a rite of passage for many American filmmakers, and it’s one they will do for the last time this year. “I’ve been at Sundance where you’re late to your screening and you literally can’t drive down Main Street the traffic is so bad,” said Gregg Araki, who is gearing up for his 10th film premiere at the festival with the buzzy comedy “I Want Your Sex.” “So you get out of your car and run,” he