Connect heartbeat if state created in render. Also fix config cleanup bug

[freddyaboulton]

Description

Noticed a bug where the heartbeat was not established if a state variable was created in a render. In the process of fixing that, I noticed that components were not being removed from the old config. The rendered_in key is in props, not the top level component config.

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Install Gradio from this PR

pip install https://gradio-builds.s3.amazonaws.com/4843c4e586c96707acb1dc6606e711e91d0fcfed/gradio-4.31.5-py3-none-any.whl

Install Gradio Python Client from this PR

pip install "gradio-client @ git+https://github.com/gradio-app/gradio@4843c4e586c96707acb1dc6606e711e91d0fcfed#subdirectory=client/python"

Install Gradio JS Client from this PR

npm install https://gradio-builds.s3.amazonaws.com/4843c4e586c96707acb1dc6606e711e91d0fcfed/gradio-client-0.19.4.tgz

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🦄 change detected

This Pull Request includes changes to the following packages.

Package	Version
@gradio/client	minor
gradio	minor

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With the following changelog entry.

Connect heartbeat if state created in render. Also fix config cleanup bug

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