Support for using input_output option in inference processor

[hkurhinen]

Is your feature request related to a problem? Please describe.
I want to use Elastic API to configure ingest pipeline with inference processor containing input_output options. However it seems that currently generated InferenceProcessor class doesn't contain field for specifying input_output option.

Describe the solution you'd like
A way to use input_output option of inference processor in the latest C# Elastic Client API

Describe alternatives you've considered
Looked around different processor options but didn't find field for specifying input_output option.

Additional context
Thank you in advance!