Allow Passing Model Keyword Arguments Through the parallelize Interface

[Dando18]

Allow passing model keyword arguments through parallelize to AutoConfig.from_pretrained.

This primarily came about because AutoConfig.from_pretrained needs to be passed trust_remote_code=True when a model repo has custom code, otherwise the config loading will fail. This will simply allow passing any custom params to the AutoConfig interface.

[siddharth9820]

lgtm. Will run the CI and merge this. Thank you