[Feature] Implement Single-Controller XCCL Weight Update#754

HwVanICI wants to merge 2 commits intoinclusionAI:maininclusionAI/AReaL:mainfrom

HwVanICI:single_controller_xccl_update_weightHwVanICI/AReaL:single_controller_xccl_update_weightCopy head branch name to clipboard