Move Gelu and LayerNorm fusion to L1 optimization (#21332)
According to https://github.com/microsoft/onnxruntime/issues/20915, we
move the Gelu and LayerNorm fusion to L1 with a condition on the ONNX
opset the model imports (LayerNorm requires opset 16+ and Gelu requires
opset 20+.) If the opset version doesn't meet the requirements, the
fusion is delayed to L2 optimization since the internal contrib op
doesn't have a requirement for any specific ONNX opset.
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Co-authored-by: Scott McKay <Scott.McKay@microsoft.com>
Co-authored-by: Edward Chen <18449977+edgchen1@users.noreply.github.com>
