Slava Tsurkerman is a Soviet emigre who has lived in New York City since 1976, apparently long enough for him to get the lay of the land. Mr. Tsukerman’s Liquid Sky (1982), which opens today at the Waverly, presents a vision of the city that is genuinely startling. His film, with a heroine who is sometimes a hero and who is apt to show up in a red corset with matching red-and-blond skunk hairdo, can hardly be for everyone. But the right audiences are bound to appreciate the originality displayed here, not to mention the color, rage, nonchalance, sly humor and ferocious fashion sense.