[Recipes][LLM PTQ] Add nvfp4 MSE+FP8-cast-KV recipes (experts_only / mlp_only) + --recipe in example scripts#1391

cjluo-nv wants to merge 2 commits intochenjiel/nvfp4-fp8-sweep-tritonNVIDIA/Model-Optimizer:chenjiel/nvfp4-fp8-sweep-tritonfrom

chenjiel/recipe-nvfp4-experts-mse-fp8-cast-kvNVIDIA/Model-Optimizer:chenjiel/recipe-nvfp4-experts-mse-fp8-cast-kvCopy head branch name to clipboard