CI refresh for 1.17.0b1

[nitzmahone]

• Python 3.13b1 support
• aarch64 musllinux 1.1 wheel support
• Dynamic matrix CI
• Build wheels from the real sdist artifact
• Misc wheel build improvements

fixes #77

[webknjaz]

@nitzmahone I see you're unpacking the tarball. That shouldn't be necessary — cibuildwheel accepts sdists as input too.

[nitzmahone]

cibuildwheel seems to be "all or nothing" with injecting an sdist tarball vs project dir for container-based builds, so if you need to bring something more over from the host beyond the sdist tarball, you have to extract it yourself. I actually tried to do it that way with PyYAML, but because I needed to pull in a cached libyaml, figured we'd just extract the sdist tarball manually to make it easier to drop in a cached libffi later.

[webknjaz]

@nitzmahone this seems to work, though: #82. Could you point out what's missing there?