Add validate images and text inputs order util for processors and test_processing_utils
Author: yonigozlan
Pull request: yes

# What does this PR do?
Add validate images and text inputs order util that will be used as a tool to preserve backward compatibility during the transition to uniform kwargs (https://github.com/huggingface/transformers/issues/31911). 
Add corresponding tests in test_processing_utils.py (didn't exist before).
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Comments:
The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/transformers/pr_33285). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.

CI failing because of this https://github.com/huggingface/transformers/pull/32406 it seems