Generate sysconfig data as a separate .PHONY build step (it's fast and useful
to be able to retrigger so why not). Update sysconfigdata to give better values
at build time

Mostly this is just package upgrades for Python 3.12 compatible versions. We
also drop the distutils and nose requirements from every package. Any python
3.12 compatible package won't require them anyways so these are outdated.

cramjam required an unfortunate pywasmcross hack. I think it's a workaround for
a clang bug

Mostly making tests version neutral. I also deleted a few mentions of distutils
from tests and documentation.

Split off from pyodide#4468 / pyodide#4435 for visibility because it's a bit troublesome.

Split off from #4468 / #4435 for visibility because it's a bit troublesome.

clang gives a weird error saying that qsort and memcmp were not declared.
This despite the fact that the file in question imported stdlib.h where they
are declared.