/kind feature

Describe the solution you'd like

Add option to skip the default postprocess method of huggingface server, as users may want to postprocess the raw prediction results their own way, which may not be possible right now.

For example, let's take the sequence_classification task:

Currently, the postprocess makes it output only the predicted idx (i.e. 0, or 1). So let's say if a user wants to get the probabilities of each idx (i.e. {0: 0.61, 1: 0.39}), it is not possible even if they implement their own postprocess, because the default postprocess will run first.

Anything else you would like to add:

Links to the design documents:
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