GitLab

* ring attn & comm

* ring-attn

* ring attn

* ring attn & unit test

* ring attn

* pre-commit reformat

* Update run_wan_i2v.sh

* Update attn.py

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Co-authored-by: “huangxinchi” <“huangxinchi@sensetime.com”>
Co-authored-by: “de1star” <“843414674@qq.com”>
Co-authored-by: gushiqiao <gushiqiao@sensetime.com>
Co-authored-by: Yang Yong(雍洋) <yongyang1030@163.com>