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
What's this PR do:
create common function `_capture_model` for capture_model
- vLLM version: v0.10.0
- vLLM main:
1891a265d3
Signed-off-by: wangxiyuan <wangxiyuan1007@gmail.com>