The up-and-comer may be the most enthralling blonde bumbershoot bearer since Catherine Deneuve broke hearts in “The Umbrellas of Cherbourg”  Multi-nominated adult performer Jamie Jett returns to Team Skeet, portraying a petite parishioner who comes in from the rain  . . .  and then ends up getting really drenched, in “Tiny Jetsetter” for the company’s ‘Exxxtra Small’ subsite. “This studio…