MLPerf Inference v6.0 closed results: Intel 4x Arc Pro B50 (BMG-B50), llama3.1-8b

MLPerf Inference v6.0 closed-division submission by Intel, system 1-node-4x-BMG-B50, accelerator name '[MAXSUN] MS-Intel Arc Pro B50 16G' x4, host Intel Xeon Platinum 8480C, Ubuntu 25.04, PyTorch vLLM, INT8 weights. llama3.1-8b Offline 1721.84 Tokens/s and Server 1187.13 Tokens/s, both aggregate across the four cards. Result logs: ./closed/Intel/results/1-node-4x-BMG-B50/llama3_1-8b/{Offline,Server}/performance/run_1 in the inference_results_v6.0 repo. Figures transcribed from summary_results.json on the default branch of that repo, not re-run.