There is lot of torchair code in model runner leading the code hard for
maintenance. We'll create new torchair_model_runner to split torchair
related logic. Following the workflow #2203, this is the first PR.
What's this PR do:
create common function `_convert_torch_foramt` for initialize_kv_cache
- vLLM version: v0.10.0
- vLLM main:
14a5d903ab
Signed-off-by: wangxiyuan <wangxiyuan1007@gmail.com>