[Misc] Add extra checking to torchair_graph_config. (#1939)

### What this PR does / why we need it?

cherry-pick #1675  to main
This PR adds validation checking to torchair_graph_config for better
reliability.

Co-authored-by: whx-sjtu <2952154980@qq.com>

### Does this PR introduce _any_ user-facing change?

No

### How was this patch tested?


- vLLM version: v0.10.0
- vLLM main:
2836dd73f1

Signed-off-by: 22dimensions <waitingwind@foxmail.com>

examples/offline_data_parallel.py

@@ -54,17 +54,16 @@ Multi-node:
                     --master-port=13345
 """
 
-import os
-from time import sleep
 import contextlib
 import gc
+import os
+from time import sleep
 
 import torch
-
 from vllm import LLM, SamplingParams
-from vllm.utils import get_open_port
 from vllm.distributed.parallel_state import (  # noqa E402
     destroy_distributed_environment, destroy_model_parallel)
+from vllm.utils import get_open_port
 
 os.environ["VLLM_USE_MODELSCOPE"] = "True"
 os.environ["VLLM_WORKER_MULTIPROC_METHOD"] = "spawn"