Enable BIGDL_OPT_IPEX in speculative baichuan2 13b example
* Baichuan2 CPU example of speculative decoding * Update generate.py * Update README.md * Update generate.py * Update generate.py * Update generate.py * fix default model * fix wrong chinese coding * Update generate.py * update prompt * update sample outputs * baichuan 7b needs transformers==4.31.0 * rename example file's name
* init from gpu * update for cpu * update * update * fix xpu readme * update * update example prompt * update prompt and add 72b * update * update