[E2E] Optimize the E2E test time. (#5294)

### What this PR does / why we need it?
Add cudagraph_capture_sizes for E2E CI test.

- vLLM version: release/v0.13.0
- vLLM main:
ad32e3e19c

Signed-off-by: menogrey <1299267905@qq.com>

tests/e2e/singlecard/test_quantization.py

@@ -36,6 +36,7 @@ def test_qwen3_w8a8_quant():
             snapshot_download("vllm-ascend/Qwen3-0.6B-W8A8"),
             max_model_len=8192,
             gpu_memory_utilization=0.7,
+            cudagraph_capture_sizes=[1, 2, 4, 8],
             quantization="ascend",
     ) as vllm_model:
         vllm_quant_w8a8_outputs = vllm_model.generate_greedy(