Add support for export ComfyUI compatible checkpoint for diffusion model(e.g., LTX-2)#911

ynankani wants to merge 4 commits intomainNVIDIA/Model-Optimizer:mainfrom

ynankani/ltx2_comfyui_checkpointNVIDIA/Model-Optimizer:ynankani/ltx2_comfyui_checkpointCopy head branch name to clipboard