Support microphone on 0.0.0.0 via https

[janmaltel]

Description

Missing microphone support is a recurring issue (#2551, #3819, #3846).

As proposed by #2551 (comment), one solution is to use openSSL and https:

openssl req -x509 -newkey rsa:4096 -keyout key.pem -out cert.pem -sha256 -days 365 -nodes

and add the certfile at launch method, and block method
demo.launch(server_name="0.0.0.0", ssl_certfile="/path/to/cert.pem", ssl_keyfile="/path/to/key.pem")

The thing is that it requires also to pass the ssl cert file in the requests.get() call in blocks.py, which is what this PR does.

The fix is backward compatible in the sense that the verify variable is set to True (=default value for verify in requests.get(verify=verify)) if no ssl_certfile is provided.

I tested the changes locally with
demo.launch(server_name="0.0.0.0", ssl_certfile="/path/to/cert.pem", ssl_keyfile="/path/to/key.pem")
and
demo.launch(share=False) (so with 127.0.0.1).

Closes: #2551

Checklist:

• I have performed a self-review of my own code
• I have added a short summary of my change to the CHANGELOG.md
• My code follows the style guidelines of this project
• I have commented my code in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

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[gradio-pr-bot]

All the demos for this PR have been deployed at https://huggingface.co/spaces/gradio-pr-deploys/pr-3872-all-demos

[abidlabs]

Hi @janmaltel thanks so much for making this PR! It looks like this PR coincides with another one designed to solve the same issue: #3873

I'll go ahead and close this one as we are adding support for websockets too in the other one. But thank you nevertheless for starting this!