Add method to the gr.Dataframe to automatic generation of the datatype-Parameter (#11527)
* Add set_auto_datatype method to Dataframe
* add changeset
* Change defalt behavior back to "str" and add "auto" datatype
* Add Unit Test
* Format backend
* clean test
* clean
* type
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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>