onnxruntime

Add ONNX LayerNormalization(17)  (#12978)

**Description**: LayerNormalization is now part of the ONNX spec as of
opset 17.
We had a LayerNormalization contrib op, which (incorrectly) was
registered in the ONNX domain. Use that implementation for the ONNX
operator.

Update skip_layer_norm_fusion.cc. There are other optimizers that use
LayerNormalization that need updates as well.

**Motivation and Context**
#12916