fix(hicache): avoid per-rank-conditional TP collective in is_load_back_event_done (decode-side hierarchical cache) - #29483

fix(hicache): avoid per-rank-conditional TP collective in is_load_back_event_done (decode-side hierarchical cache)#29483

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sgl-project:mainsgl-project/sglang:mainfrom

AMD-yanfeiwang:fix/hicache-load-back-event-done-no-collectiveAMD-yanfeiwang/sglang:fix/hicache-load-back-event-done-no-collectiveCopy head branch name to clipboard