add input and select event tests to radio unit tests

[hannahblair]

Description

depends on #13235, see description

[gradio-pr-bot]

🦄 no changes detected

This Pull Request does not include changes to any packages.

__No changes detected. __

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[gradio-pr-bot]

🪼 branch checks and previews

•	Name	Status	URL
	Spaces	ready!	Spaces preview
	Storybook	ready!	Storybook preview
🦄	Changes	detected!	Details

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Install Gradio from this PR

pip install https://huggingface.co/buckets/gradio/pypi-previews/resolve/8c37d167abd2dbe232416d3b496ed2b264c1fa57/gradio-6.11.0-py3-none-any.whl

Install Gradio Python Client from this PR

pip install "gradio-client @ git+https://github.com/gradio-app/gradio@8c37d167abd2dbe232416d3b496ed2b264c1fa57#subdirectory=client/python"

Install Gradio JS Client from this PR

npm install https://gradio-npm-previews.s3.amazonaws.com/8c37d167abd2dbe232416d3b496ed2b264c1fa57/gradio-client-2.1.0.tgz