[TorchOnnxToTorch] Fix LayerNormalization scale/bias dtype mismatch with stash_type#4498

bjw-0 wants to merge 3 commits intollvm:mainllvm/torch-mlir:mainfrom

bjw-0:fix-layernorm-scale-bias-dtypebjw-0/torch-mlir:fix-layernorm-scale-bias-dtypeCopy head branch name to clipboard