### What this PR does / why we need it? this PR based on [19746](https://github.com/vllm-project/vllm/issues/19746), support Prompt Embeddings for v1 engine on NPU ### Does this PR introduce _any_ user-facing change? ### How was this patch tested? ```python python examples/prompt_embed_inference.py ``` - vLLM version: v0.11.0 - vLLM main: https://github.com/vllm-project/vllm/commit/releases/v0.11.1 --------- Signed-off-by: jesse <szxfml@gmail.com>