### What this PR does / why we need it? Move torchair related rotary ops into torchair dir to make the code clear. Next step we'll remove all torchair related code outside of torchair rotary ops. ### Does this PR introduce _any_ user-facing change? No ### How was this patch tested? vLLM version: main vLLM main:ab9f2cfd19- vLLM version: v0.10.1.1 - vLLM main:81eea3d348Signed-off-by: hust17yixuan <303660421@qq.com>