[UT] fix skipped test_utils ut test. (#3422)

### What this PR does / why we need it?
Fixes: fix the test in `tests/ut/torchair/test_utils.py` and enable the
UT test in CI.
### Does this PR introduce _any_ user-facing change?
No.
### How was this patch tested?
vLLM version: v0.11.0rc3
vLLM main: https://github.com/vllm-project/vllm/commit/v0.11.0

- vLLM version: v0.11.0rc3
- vLLM main: https://github.com/vllm-project/vllm/commit/v0.11.0

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

.github/workflows/vllm_ascend_test.yaml

@@ -128,7 +128,6 @@ jobs:
           --ignore=tests/ut/kv_connector/test_remote_decode_lifecycle.py \
           --ignore=tests/ut/kv_connector/test_remote_prefill_lifecycle.py \
           --ignore=tests/ut/torchair/models/test_torchair_deepseek_v2.py \
-          --ignore=tests/ut/torchair/test_utils.py
 
       - name: Upload coverage to Codecov
         # only upload coverage when commits merged