Rename method to avoid clash with property
# What does this PR do?

Fixes a bug when the `self.rescale` method was being called, but `self.rescale` was set as a property. This arose after a refactoring of the feature extractors in my PR: https://github.com/huggingface/transformers/pull/18499, causing an issue in any model that had `rescale` as a property in its config. Renaming considered safe as the new `rescale` method was introduced yesterday. 

Issue raised by user here: https://github.com/huggingface/transformers/commit/49e44b216b2559e34e945d5dcdbbe2238859e29b#comments
and caught in doctests. 

Renames the method to be less ambiguous. 


## Before submitting
- [ ] This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
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      Pull Request section?
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- [ ] Did you write any new necessary tests?
_The documentation is not available anymore as the PR was closed or merged._<|||||>The layoulmv2 and layoutlmv3 tests appear to be failing due to an issue when importing from the [detectron2](https://github.com/facebookresearch/detectron2) package. 

When `from detectron2.modeling import META_ARCH_REGISTRY` is called, it fails with the error `ImportError: cannot import name 'is_fx_tracing' from 'torch.fx._symbolic_trace'`. This has been reported by other users of the library - see [commit comments](https://github.com/facebookresearch/detectron2/commit/36a65a0907d90ed591479b2ebaa8b61cfa0b4ef0#comments).<|||||>@ydshieh I believe it comes from the `preprocessor_config.json` file: https://huggingface.co/google/owlvit-large-patch14/blob/main/preprocessor_config.json. 

<|||||>> @ydshieh I believe it comes from the `preprocessor_config.json` file: https://huggingface.co/google/owlvit-large-patch14/blob/main/preprocessor_config.json.

I will update the `preprocessor_config.json` files, the rescale argument is not used anymore.<|||||>@ydshieh Yep - will do! 