Merge with Android cross venv from cibuildwheel

[mhsmith]

What is the problem or limitation you are having?

This project duplicates a similar implementation in cibuildwheel.

Describe the solution you'd like

Merge the two implementations, and migrate cibuildwheel to use xbuild.

The cibuildwheel implementation is here:

• https://github.com/pypa/cibuildwheel/blob/main/cibuildwheel/resources/_cross_venv.py

When experimenting with using this to run pip in chaquo/chaquopy#1416, I added compatiblity with Python 3.12 and older. I abandoned that approach with pip, but it may be worth including here:

• https://github.com/chaquo/chaquopy/blob/9d628a81a02b499827380047dba8ebc443489bf0/product/gradle-plugin/src/main/python/_cross_venv.py