feat: Support Chunked Linear Fusion for GRPO#2833

pengdurice wants to merge 10 commits into

NVIDIA-NeMo:mainNVIDIA-NeMo/RL:mainfrom

pengdurice:peng-linear-ce-loss-grpo-v1-cleanpengdurice/RL:peng-linear-ce-loss-grpo-v1-cleanCopy head branch name to clipboard