security/py-social-auth-core: Allow build with py-google-auth 2.48.0+
- While I'm here, move google-auth related changed to a separate patch file
- Bump PORTREVISION for package change
Obtained from: https://github.com/python-social-auth/social-core/commit/b6703f487259794871d914541b716dd14a3bcba3
Approved by: portmgr (blanket)