torch->onnx->mge过程中的后半段（onnx->mge）的问题

在onnx模型转mge模型时候无法正常运行，卡在下面这个位置点不动了。

>>> from mgeconvert.converters.onnx_to_mge import onnx_to_mge
>>> onnx_to_mge( 'onnx2.onnx', output="mge.mge", )
ONNX Model Producer : pytorch
ONNX Model Producer Version: 1.8
ONNX Model IR Version : 6
ONNX Model OpSet : 11
`

Start at the reported mgeconvert.converters.onnx_to_mge entry point and reproduce the conversion using onnx2.onnx with output set to mge.mge. Trace where execution stops after the producer, IR, and opset information; done means the ONNX-to-MGE conversion completes normally or the blocking cause is identified.

Written by the indexing model from the issue text.