The Soaking WET dance series, produced by David Parker and Jeffrey Kazin, presents two different programs, two performances daily, showcasing both emerging and established choreographers, at the intimate West End Theater, February 5-8.   Program A features short works by choreographers Racy Brand, Tina Croll, Jennifer Edwards, Garnet Henderson, and Hanna Q Dance Company.   (Thur-Sat at 7 PM; Sun at 2 PM)      Program B is "A Natural History," dances by Catherine Tharin and Esme Boyce (Thurs-Sat at 8:30 PM; Sun at 4 PM)