[AMD][DI][CI] 1/N: MI355X disaggregation nightly benchmark (#29084)

Co-authored-by: Michael <13900043+michaelzhang-ai@users.noreply.github.com>
Co-authored-by: bingxche <bingxche@amd.com>
Co-authored-by: yctseng0211 <yctseng@amd.com>

scripts/ci/slurm/process_result.py

@@ -76,7 +76,7 @@ if recipe_file and Path(recipe_file).exists():
 total_gpus = prefill_gpus + decode_gpus
 
 data = {
-    "hw": "gb200",
+    "hw": os.environ.get("HW", "gb200"),
     "conc": int(raw["max_concurrency"]),
     "model": raw["model_id"],
     "infmax_model_prefix": model_prefix,