Well, almost. Had the OC prima donnas at Fashion Island in Newport Beach known what was going on under the big tent across the street at the Island Hotel this past weekend, they would have run for cover under their Beemers and Benzes. Mexicans. Puerto Ricans. Colombians. Guatemalans. Dominicans, Argentinos, most American, some not, descended on the hotel by the hundreds. And they didn't come to make the beds. On Friday, Luis Valdez, the legendary filmmaker (Zoot Suit, La Bamba) and founder of th