[Docathon][Fix Doc Format No.10] fix global_gather_cn (#7480)

* feat: 文档修复

* feat: 格式化Python代码

* remove: code block

* remove: 异常 COPY-FROM

* feat: 更新代码

* remove: useless word(s)/symbol(s)

* remove: code block

* Delete docs/api/paddle/distributed/utils/global_gather_cn.rst

Author: aztice