megatron support for Kimi K2.5

[sys-reasoner]

Checklist / 检查清单

• I have searched existing issues, and this is a new feature request. / 我已经搜索过现有的 issues，确认这是一个新的 Feature Request。

Feature Request Description / Feature Request 描述

Hi team,

Do you have plans to support K2.5 megatron training? Thanks!

Pull Request / Pull Request 信息

No response

[github-actions]

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[Jintao-Huang]

modelscope/mcore-bridge#52