MXNet_ONNX export feature request

[Roshrini]

Description

Right now MXNet_ONNX export feature supports converting symbol and params file to ONNX protobuf.
Extend this functionality to export mxnet module directly into ONNX protobuf file.

MXNet_export is currently in PR
#11213

@sandeep-krishnamurthy @spidydev @anirudhacharya

@sandeep-krishnamurthy Can you plz label it as "FeatureRequest".

[vrakesh]

@Roshrini thanks for raising the feature request, this should come in handy.

[piyushghai]

@Roshrini Seems like the related PR for your feature request got merged.
Can you please close the issue ?

Thanks!

[Roshrini]

@piyushghai This is for the enhancement of the exisiting feature which got merged.

[piyushghai]

Thanks @Roshrini