Update Qwen3 235B A22B MXFP8 GB200/300 recipe and resolve NaN grad norm#2209

erhoo82 merged 1 commit intoNVIDIA-NeMo:mainNVIDIA-NeMo/Megatron-Bridge:mainfrom

dingqingy-nv:qwen3_mxfp8_recipe_updatedingqingy-nv/Megatron-Bridge:qwen3_mxfp8_recipe_updateCopy head branch name to clipboard