Remove footers and min-height the correct way

[aliabd]

The footers and min-height on embedded components in the docs create annoying space and ruin the flow. We've been removing them with js on the page but it hasn't been reliable and often doesn't work because the components load late. This removes them using css inside the demos themselves. Live on staging

Closes: #2827

[github-actions]

The demo notebooks don't match the run.py files. Please run this command from the root of the repo and then commit the changes:

pip install nbformat && cd demo && python generate_notebooks.py

[github-actions]

The demo notebooks don't match the run.py files. Please run this command from the root of the repo and then commit the changes:

pip install nbformat && cd demo && python generate_notebooks.py

[github-actions]

All the demos for this PR have been deployed at https://huggingface.co/spaces/gradio-pr-deploys/pr-2860-all-demos

[github-actions]

The demo notebooks don't match the run.py files. Please run this command from the root of the repo and then commit the changes:

pip install nbformat && cd demo && python generate_notebooks.py

[github-actions]

The demo notebooks don't match the run.py files. Please run this command from the root of the repo and then commit the changes:

pip install nbformat && cd demo && python generate_notebooks.py

[github-actions]

The demo notebooks don't match the run.py files. Please run this command from the root of the repo and then commit the changes:

pip install nbformat && cd demo && python generate_notebooks.py

[github-actions]

The demo notebooks don't match the run.py files. Please run this command from the root of the repo and then commit the changes:

pip install nbformat && cd demo && python generate_notebooks.py

[github-actions]

The demo notebooks don't match the run.py files. Please run this command from the root of the repo and then commit the changes:

pip install nbformat && cd demo && python generate_notebooks.py

[github-actions]

The demo notebooks don't match the run.py files. Please run this command from the root of the repo and then commit the changes:

pip install nbformat && cd demo && python generate_notebooks.py

[aliabd]

You can see my struggle above with the demo notebooks action, but it turned out there was actually a problem. Locally I had a gradio_cached_examples folder in fake_gan (for some reason), so when generating the notebook it thought that was a file the demo needed to run, and added a wget for it. But gradio_cached_examples is in gitignore, so when the commands are run from the action there's no wget and it causes the fail.

Will add gradio_cached_examples to list of files to ignore when notebooks are generated (in a separate PR)

[abidlabs]

Beautiful, looks great @aliabd! Can you just verify one thing:

The embedded demos in "try examples" are not working for me on staging.

For example: https://www.gradio-staging.com/docs/main/#radio, when I click try examples, I get this:

They are working if I set the toggle to 3.14.0, as well as on www.gradio.app/docs. But I can't see what it might have to do with your change. If they are working for you, then I assume it's something weird on my device and the PR looks good to merge, but if they aren't, then we should investigate

[aliabd]

@abidlabs there's an issue with the spaces themselves, and not all of them. Just some of the _main spaces (the versioned ones don't get updated except on new releases). For some reason many of the _main spaces returned a build error. Will try again and if there's still a problem will check with the spaces team. Unrelated to embedding or this PR though so I will merge

[aliabd]

@abidlabs that is to say, those demos are also broken on gradio.app/main