By Gloria Dickie and Mai ShamsElDin SHARM EL-SHEIKH, Egypt, (Reuters) – Civil society groups and youth activists at the U.N. COP27 summit held small pop-up rallies Wednesday at designated areas in this Red Sea resort town. None lasted more than a few hours, and some broke up after less than an hour. They were all being held within areas under U.N. responsibility during the two-week international summit. “There’s no time anymore to keep coming to these COPs as an exercise, when parties come in their private jets and are sponsored by Coca-Cola, etc., and we do a whole dance around an issue so cr…