[dgx.b200] add runner type (#697)

Author: xuzhao9

.ci/test_infra/oss_ci_benchmark_v3.py

@@ -24,6 +24,11 @@
         "gpu_count": 1,
         "avail_gpu_mem_in_gb": 288,
     },
+    "linux.dgx.b200": {
+        "name": "linux.dgx.b200",
+        "gpu_count": 1,
+        "avail_gpu_mem_in_gb": 192,
+    }
 }
 
 
@@ -52,7 +57,7 @@ def setup_tritonbench_cwd():
 def parse_runners(
     runner_name: str, runner_type: str, envs: Dict[str, str]
 ) -> List[Dict[str, Any]]:
-    runner_mapping = RUNNER_TYPE_MAPPING[runner_type].copy()
+    runner_mapping = RUNNER_TYPE_MAPPING.get(runner_type, {}).copy()
     runner_mapping["name"] = runner_name
     runner_mapping["gpu_info"] = envs["device"]
     runner_mapping["extra_info"] = {}