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/configs/Qwen2.5-VL-7B-Instruct.yaml

@@ -0,0 +1,8 @@
+model_name: "Qwen/Qwen2.5-VL-7B-Instruct"
+model: "vllm-vlm"
+tasks:
+- name: "mmmu_val"
+  metrics:
+  - name: "acc,none"
+    value: 0.51
+max_model_len: 8192

tests/e2e/singlecard/models/configs/Qwen3-30B-A3B.yaml

@@ -0,0 +1,18 @@
+model_name: "Qwen/Qwen3-30B-A3B"
+tasks:
+- name: "gsm8k"
+  metrics:
+  - name: "exact_match,strict-match"
+    value: 0.89
+  - name: "exact_match,flexible-extract"
+    value: 0.85
+- name: "ceval-valid"
+  metrics:
+  - name: "acc,none"
+    value: 0.84
+num_fewshot: 5
+gpu_memory_utilization: 0.6
+enable_expert_parallel: True
+tensor_parallel_size: 2
+apply_chat_template: False
+fewshot_as_multiturn: False

tests/e2e/singlecard/models/configs/Qwen3-8B-Base.yaml

@@ -0,0 +1,13 @@
+model_name: "Qwen/Qwen3-8B-Base"
+tasks:
+- name: "gsm8k"
+  metrics:
+  - name: "exact_match,strict-match"
+    value: 0.82
+  - name: "exact_match,flexible-extract"
+    value: 0.83
+- name: "ceval-valid"
+  metrics:
+  - name: "acc,none"
+    value: 0.82
+num_fewshot: 5

tests/e2e/singlecard/models/configs/accuracy.txt

@@ -0,0 +1,3 @@
+Qwen3-8B-Base.yaml
+Qwen2.5-VL-7B-Instruct.yaml
+Qwen3-30B-A3B.yaml