[CI] Optimize nightly CI (#3898)

### What this PR does / why we need it?
This patch mainly fix the the problem of not being able to determine the
exit status of the pod's entrypoint script and some other tiny
optimizations:
1. Shorten wait for server timeout
2. fix typo
3. fix the issue of ais_bench failing to correctly access the proxy URL
in a PD separation scenario.
### Does this PR introduce _any_ user-facing change?

### How was this patch tested?


- vLLM version: v0.11.0
- vLLM main:
83f478bb19

---------

Signed-off-by: wangli <wangli858794774@gmail.com>

tests/e2e/nightly/multi_node/config/models/DeepSeek-V3.yaml

@@ -97,3 +97,12 @@ deployment:
             }
         }'
 benchmarks:
+  acc:
+    case_type: accuracy
+    dataset_path: vllm-ascend/gsm8k-lite
+    request_conf: vllm_api_general_chat
+    dataset_conf: gsm8k/gsm8k_gen_0_shot_cot_chat_prompt
+    max_out_len: 4096
+    batch_size: 512
+    baseline: 95
+    threshold: 5

tests/e2e/nightly/multi_node/config/models/Qwen3-235B-A3B.yaml

@@ -47,3 +47,4 @@ deployment:
         --no-enable-prefix-caching
         --gpu-memory-utilization 0.9
 benchmarks:
+

tests/e2e/nightly/multi_node/config/multi_node_config.py

@@ -17,6 +17,7 @@ setup_logger()
 logger = logging.getLogger(__name__)
 DISAGGREGATED_PREFILL_PROXY_SCRIPT = "examples/disaggregated_prefill_v1/load_balance_proxy_server_example.py"
 DISAGGEGATED_PREFILL_PORT = 5333
+CONFIG_BASE_PATH = "tests/e2e/nightly/multi_node/config/models/"
 
 
 @dataclass
@@ -187,9 +188,8 @@ class MultiNodeConfig:
     @classmethod
     def from_yaml(cls, yaml_path: Optional[str] = None):
         if not yaml_path:
-            yaml_path = os.getenv(
-                "CONFIG_YAML_PATH",
-                "tests/e2e/nightly/multi_node/config/models/DeepSeek-V3.yaml")
+            yaml_path = os.getenv("CONFIG_YAML_PATH", "DeepSeek-V3.yaml")
+        yaml_path = os.path.join(CONFIG_BASE_PATH, yaml_path)
         with open(yaml_path, 'r') as file:
             config_data = yaml.safe_load(file)
         test_name = config_data.get("test_name", "default_test")
@@ -255,6 +255,7 @@ class MultiNodeConfig:
         ranktable_path = self.disaggregated_prefill.get("ranktable_path")
         assert ranktable_gen_path is not None and ranktable_path is not None
         if os.path.exists(str(ranktable_path)):
+            logger.info("ranktable has already generated")
             return
 
         local_host = self.cur_ip
@@ -286,6 +287,8 @@ class MultiNodeConfig:
         assert self.nic_name is not None
         env["GLOO_SOCKET_IFNAME"] = self.nic_name
 
+        logger.info(
+            f"Generating ranktable from command: {' '.join(map(str, cmd))}")
         subprocess.run(cmd, env=env, check=True)
         assert os.path.exists(
             str(ranktable_path)), "failed generate ranktable.json"