Fix bug in example cache loading event

[freddyaboulton]

Description

Closes: #5634

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Install Gradio from this PR

pip install https://gradio-builds.s3.amazonaws.com/eddaebe3236dd57cc1874661b927e9beceaf9e16/gradio-3.44.4-py3-none-any.whl

Install Gradio Python Client from this PR

pip install "gradio-client @ git+https://github.com/gradio-app/gradio@eddaebe3236dd57cc1874661b927e9beceaf9e16#subdirectory=client/python"

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Fix bug in example cache loading event

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[abidlabs]

Just to confirm, you launch on the same port to ensure that the server truly has shutdown? I don't think you need to do this.

Even if demo.launch() were to launch a FastAPI app on a new port, it would still read from the same cache since the ids of the components hasn't changed.

So you can remove the hardcoding of the server ports (which will be better in case this port is occupied)

[freddyaboulton]

The time.sleep is to ensure shutdown. Hardcoding the same port is for paranoia 😂 Let me fix.

[abidlabs]

Bad whitespace! Nice fix @freddyaboulton

This actually also fixes: #5521

Left a nit about the tests. Otherwise lgtm!