[None][fix] Guard CUDA event elapsed_time in perf_metrics_manager to prevent executor crash#12868

Tabrizian merged 5 commits intoNVIDIA:mainNVIDIA/TensorRT-LLM:mainfrom

yifjiang:fix/perf-metrics-cuda-event-crashyifjiang/TensorRT-LLM:fix/perf-metrics-cuda-event-crashCopy head branch name to clipboard