[BugFix] Fixes Qwen3-Next enable nz accuracy problem (#4058)

### What this PR does / why we need it?
- Fixes Qwen3-Next enable nz accuracy problem

### Does this PR introduce _any_ user-facing change?
N/A


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

---------

Signed-off-by: Icey <1790571317@qq.com>
Signed-off-by: wxsIcey <1790571317@qq.com>

tests/ut/quantization/test_w4a8_dynamic.py

@@ -260,6 +260,7 @@ class TestAscendW4A8DynamicFusedMoEMethod(TestBase):
                 requires_grad=False)
         return layer
 
+    @patch('vllm_ascend.utils._ENABLE_NZ', False)
     @patch('torch_npu.npu_format_cast')
     @patch('torch_npu.npu_quantize')
     @patch('torch.Tensor.npu')