[Fixbug] Fix accuracy for DeepSeek-V2-Lite (#3016)

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

Fix accuracy for DeepSeek-V2-Lite

### Does this PR introduce _any_ user-facing change?
no

### How was this patch tested?
CI passed

- vLLM version: v0.10.2
- vLLM main:
66072b36db

Signed-off-by: hfadzxy <starmoon_zhang@163.com>

tests/e2e/models/configs/DeepSeek-V2-Lite.yaml

@@ -7,6 +7,8 @@ tasks:
   - name: "exact_match,flexible-extract"
     value: 0.375
 tensor_parallel_size: 2
+batch_size: 8
+gpu_memory_utilization: 0.7
 apply_chat_template: False
 fewshot_as_multiturn: False
 trust_remote_code: True