add test

Signed-off-by: wangli <wangli858794774@gmail.com>

Author: Potabk

.github/workflows/vllm_ascend_test.yaml

@@ -171,3 +171,4 @@ jobs:
           PYTORCH_NPU_ALLOC_CONF: max_split_size_mb:256
         run: |
           pytest -sv
+          pytest -sv ./vllm-empty/tests/entrypoints/openai/test_completion_with_prompt_embeds.py