Fix `processing_utils.save_url_to_cache()` to follow redirects when accessing the URL (#7322)
* Fix `processing_utils.save_url_to_cache()` to follow redirects when accessing the URL
* add changeset
* follow more redirects
* format
* add changeset
* add test
* validate urls
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Co-authored-by: gradio-pr-bot <gradio-pr-bot@users.noreply.github.com>
Co-authored-by: Abubakar Abid <abubakar@huggingface.co>