[issue45847] Port module setup to PY_STDLIB_MOD() macro and addext()

[Pablo Galindo Salgado]

Pablo Galindo Salgado <pablogsal at gmail.com> added the comment:

I may need to revert this commit to unblock the release if no one can take a look today

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue45847>
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