cp: Update Deepseek V3 MXFP8 GB200 mapping (2215) into r0.3.0#2378

ko3n1g merged 1 commit intor0.3.0NVIDIA-NeMo/Megatron-Bridge:r0.3.0from

cherry-pick-2215-r0.3.0NVIDIA-NeMo/Megatron-Bridge:cherry-pick-2215-r0.3.0Copy head branch name to clipboard