Enable pytest and yaml style accuracy test (#2073)

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

This PR enabled pytest and yaml style accuracy test, users now can
enable accuracy test by running:

```bash
cd ~/vllm-ascend
pytest -sv ./tests/e2e/singlecard/models/test_lm_eval_correctness.py \
          --config ./tests/e2e/singlecard/models/configs/Qwen3-8B-Base.yaml \
          --report_output ./benchmarks/accuracy/Qwen3-8B-Base.md

pytest -sv ./tests/e2e/singlecard/models/test_lm_eval_correctness.py \
          --config-list-file ./tests/e2e/singlecard/models/configs/accuracy.txt
```

Closes: https://github.com/vllm-project/vllm-ascend/issues/1970

### 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: Icey <1790571317@qq.com>

tests/e2e/singlecard/models/conftest.py

@@ -0,0 +1,73 @@
+# SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
+from pathlib import Path
+
+import pytest
+
+
+def pytest_addoption(parser):
+    parser.addoption(
+        "--config-list-file",
+        action="store",
+        default=None,
+        help="Path to the file listing model config YAMLs (one per line)",
+    )
+    parser.addoption(
+        "--tp-size",
+        action="store",
+        default="1",
+        help="Tensor parallel size to use for evaluation",
+    )
+    parser.addoption(
+        "--config",
+        action="store",
+        default="./tests/e2e/singlecard/models/configs/Qwen3-8B-Base.yaml",
+        help="Path to the model config YAML file",
+    )
+    parser.addoption(
+        "--report_output",
+        action="store",
+        default="./benchmarks/accuracy/Qwen3-8B-Base.md",
+        help="Path to the report output file",
+    )
+
+
+@pytest.fixture(scope="session")
+def config_list_file(pytestconfig, config_dir):
+    rel_path = pytestconfig.getoption("--config-list-file")
+    return config_dir / rel_path
+
+
+@pytest.fixture(scope="session")
+def tp_size(pytestconfig):
+    return pytestconfig.getoption("--tp-size")
+
+
+@pytest.fixture(scope="session")
+def config(pytestconfig):
+    return pytestconfig.getoption("--config")
+
+
+@pytest.fixture(scope="session")
+def report_output(pytestconfig):
+    return pytestconfig.getoption("--report_output")
+
+
+def pytest_generate_tests(metafunc):
+    if "config_filename" in metafunc.fixturenames:
+        # If config specified, use the --config directly
+        single_config = metafunc.config.getoption("--config")
+        if single_config:
+            metafunc.parametrize("config_filename",
+                                 [Path(single_config).resolve()])
+            return
+        # Otherwise, check --config-list-file
+        rel_path = metafunc.config.getoption("--config-list-file")
+        config_list_file = Path(rel_path).resolve()
+        config_dir = config_list_file.parent
+        with open(config_list_file, encoding="utf-8") as f:
+            configs = [
+                config_dir / line.strip() for line in f
+                if line.strip() and not line.startswith("#")
+            ]
+        metafunc.parametrize("config_filename", configs)