Fix path generation for returned files for bash API (#10841)
* added error mesasge if wrong route_path has been provided
* implemented fix for bash based data return urls
* add changeset
* removed error message in route_utils to not break gradio
* fix api docs
* add changeset
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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>
