ViTFeatureExtractor.save_pretrained() generate "preprocessor_config.json" but not "config.json"
config.json is needed to use ViTForImageClassification.from_pretrained()

I made a pull-request
`ViTFeatureExtractor` is the feature extractor, not the model itself. The model itself requires the `config.json` file that specifies the architecture of the model, while the feature extractor requires its `preprocessor_config.json` file. These two are different files.<|||||>The problem is ViTForImageClassification.from_pretrained() not take "preprocessor_config.json" and you need to rename it as "config.json".
Thanks<|||||>`ViTForImageClassification` is not `ViTFeatureExtractor`, the first one is a model while the second one is a feature extractor. See some usage examples [here](https://huggingface.co/transformers/model_doc/vit.html#transformers.ViTForImageClassification)<|||||>This issue has been automatically marked as stale because it has not had recent activity. If you think this still needs to be addressed please comment on this thread.

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