add open-llama model with ckpt (#22795)
* update Open-Llama model
* update
* update format
* update doc
* update
* update stable embedding test
* update test case
* update format
* update readme
* fix typo
* update name
* remove tokenizer and update format
* remove convert_open_llama_weights_to_hf
* update warning and doc_string
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Co-authored-by: songliang.bayesian <songliang.bayesian@bytedance.com>