Add arm64 mac and linux wheels

[ddelange]

Fixes #870 Fixes #936 Fixes #950

This PR:

• Adds a fair amount of parallellization ref https://github.com/pypa/cibuildwheel/issues/1088#issuecomment-1250024795
• Uses latest manylinux images (RHEL8.6) for building future-proof wheels: the default yum repo comes with pg10 (left it like that for simplicity in the install script)
• Automatically determines which python versions to build wheels for based on setup.py
• Avoids prematurely publishing new docs when building wheels could still fail

[staciax]

hope 🥺

[ddelange]

@elprans could you re-run failed CI?

[mbrav]

Thank you so much for this merge. I wanted to run a project using asyncpg on a Rpi some time ago but couldn't. Will have to check how it works out.

[staciax]

thanks you so much now i can running my project in ipad (m1) <3