`python`: try installing precompiled binaries if available?

[xaf]

Pre-compiled Python binaries are made available in this repo: https://github.com/indygreg/python-build-standalone They have some quirks (https://github.com/indygreg/python-build-standalone/blob/main/docs/quirks.rst) but nothing too bad. This could be making the process of installing new python versions way faster, i.e. not depending on building them all the time.