[TRTLLM-9541][infra] Use artifactory mirror for download.pytorch.org#9477

ZhanruiSunCh merged 9 commits intoNVIDIA:mainNVIDIA/TensorRT-LLM:mainfrom

ZhanruiSunCh:user/zhanruis/1126_fix_download_from_pytorch_flakyZhanruiSunCh/TensorRT-LLM:user/zhanruis/1126_fix_download_from_pytorch_flakyCopy head branch name to clipboard