Change `build-python-packages` defaults for convenience

We only need to build the free threading packages because we're using
the default builds from upstream actions/python-versions.

We don't have arm64 Ubuntu or Windows runners, so skip those for now.

Support building free-threaded CPython

Add support for Python's free threading build mode where the global
interpreter lock is disabled. The packages are marked using a suffix on
the architecture, like 'x64-freethreaded' or 'arm64-freethreaded'.

Support building free-threaded CPython

Add support for Python's free threading build mode where the global
interpreter lock is disabled. The packages are marked using a suffix on
the architecture, like 'x64-freethreaded' or 'arm64-freethreaded'.

yolo windows