Update examples with image processors
# What does this PR do?

Updates all of the feature extractor references to image processors in the `examples` folder.


## Before submitting
- [ ] This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
- [x] 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 documentation is not available anymore as the PR was closed or merged._<|||||>This broke the deepspeed tests. Fix is here: https://github.com/huggingface/transformers/pull/21283

when modifying examples and breaking back compat please scan the slow tests and adjust those too. Thank you!

The reason this is important is because Deepspeed CI runs our slow deepspeed tests as normal CI so when we break things their CI is broken.<|||||>@stas00  - thanks for applying a quick fix and apologies about the break. I'll make sure to remember the slow tests next time! <|||||>Thank you, Amy!

`tests/extended/` and `tests/deepspeed` are the ones that heavily rely on `examples/pytorch`

