Automate python env cert chain check

[mwfarb]

Some Apple python env have not certs, and users see the urllib error:
err=URLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate in certificate chain (_ssl.c:1129)')), type(err)=<class 'urllib.error.URLError'>
which is pretty confusing for many.

Instead, we can automate the cert check and use first part of this gist: https://gist.github.com/mwfarb/c45958c321f021b3b472248c1e4cfc5d

If it fails instead of this error we can direct users to: https://arena.conix.io/content/troubleshooting.html#python-unable-to-get-local-issuer-certificate