OptimumConversion pass support in the olive auto-opt

[alexsu52]

olive auto-opt supports OnnxConversion and ModelBuilder passes but does not support OptimumConversion pass from olive/passes/onnx/optimum_conversion.py. It look like that OptimumConversion pass can significant increase model coverage of olive auto-opt. An option like --use_optimum can be added alongside the existing --use_model_builder.

What do you think about adding the option to use OptimumConversion pass in olive-opt?

[xiaoyu-work]

OptimumConversion pass is rarely used for now. All models should be able to export by either OnnxConversion or ModelBuilder. May i know your use case of OptimumConversion?

[alexsu52]

Support for converting complex pipelines that are already supported in optimum but no support in olive auto-opt, such as stable diffusion.