Add copied from for image processor methods
# What does this PR do?

Adds `# Copied from` headers to shared image processor methods to ensure any updates to e.g. docstrings are propogated across. This mainly applies to the methods resize, center_crop and rescale. 

This is in part to prepare for any future adaptations to make handling of images with different number of channels / ambiguous data formats e.g. adding `input_data_format` arguments or handling an ImageArray object. 

## Before submitting
- [ ] This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
- [ ] Did you read the [contributor guideline](https://github.com/huggingface/transformers/blob/main/CONTRIBUTING.md#start-contributing-pull-requests),
      Pull Request section?
- [ ] Was this discussed/approved via a Github issue or the [forum](https://discuss.huggingface.co/)? Please add a link
      to it if that's the case.
- [ ] Did you make sure to update the documentation with your changes? Here are the
      [documentation guidelines](https://github.com/huggingface/transformers/tree/main/docs), and
      [here are tips on formatting docstrings](https://github.com/huggingface/transformers/tree/main/docs#writing-source-documentation).
- [ ] Did you write any new necessary tests?

The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/transformers/pr_25121). All of your documentation changes will be reflected on that endpoint.