Migrate remaining relevant portions of Victor Stinner's tutorial to devguide

[CAM-Gerlach]

As discussed in other issues (e.g. #1044 ) and PRs (e.g. #989 ), it would be nice to complete the migration of any not-already-covered relevant portions of Victor Stinner's CPython Core Tutorial into the devguide, especially now that he has archived it, which Victor gave permission for.

The relevant pages are apparently, per Victor,

• https://github.com/vstinner/cpython_core_tutorial/blob/main/build_cpython_linux.rst
• https://github.com/vstinner/cpython_core_tutorial/blob/main/build_cpython_macos.rst
• https://github.com/vstinner/cpython_core_tutorial/blob/main/build_cpython_windows.rst