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

[Christian Heimes]

Change by Christian Heimes <lists at cheimes.de>:


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pull_requests: +27909
pull_request: https://github.com/python/cpython/pull/29668

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