Update python API of activation, topk, norm and rope and remove vllm dependency (#6614)

Co-authored-by: Wu, Chunyuan <chunyuan.wu@intel.com>
Co-authored-by: jianan-gu <jianan.gu@intel.com>
Co-authored-by: sdp <sdp@gnr799219.jf.intel.com>

docker/Dockerfile.xeon

@@ -39,6 +39,7 @@ RUN git clone https://github.com/sgl-project/sglang.git && \
     cp pyproject_cpu.toml pyproject.toml && \
     pip install -v .
 
+ENV SGLANG_USE_CPU_ENGINE=1
 ENV LD_PRELOAD=/sgl-workspace/miniforge3/lib/libiomp5.so:/sgl-workspace/miniforge3/lib/libtcmalloc.so:/sgl-workspace/miniforge3/lib/libtbbmalloc.so.2
 
 WORKDIR /sgl-workspace/sglang