### What this PR does / why we need it? Fix the bug of #703, where vllm wrong raised the ERROR : Failed to import vllm_ascend_C:No module named 'vllm_ascend.vllm_ascend_C'. The format for reporting import vllm_ascend_C failure is unified by warning ("Failed to import vllm_ascend_C:%s", e). ### Does this PR introduce _any_ user-facing change? No --------- Signed-off-by: yangpuPKU <604425840@qq.com>