Consider reverting the autoconf 2.72 version bump requirement as it breaks compatibility with distros

Bug report

Bug description:

autoconf minimum requirement was bumped to 2.72 through https://github.com/python/cpython/issues/115765

This breaks configure regeneration for CentOS Stream 9/RHEL9 (shipping 2.69 and extra 2.71) and CentOS Stream 10/RHEL10 (shipping 2.71). I presume other distros as well. We currently patch our spec files, lowering the version (to 2.69 and 2.71) makes them work fine.

I (re)discovered the issue by doing some testing on the newly added CentOS Stream buildbot.

And as far as I can see there is nothing used from 2.72, no functional changes. Requiring 2.72 is too aggressive and it seems it was not tested on any major distros at the time.

CPython versions tested on:

CPython main branch, 3.16, 3.15, 3.14

Operating systems tested on:

Linux

issue 115765 で導入された autoconf の最小バージョン変更と、それが影響する configure の再生成パスを確認してください。記載されている CentOS Stream 9/RHEL 9 および CentOS Stream 10/RHEL 10 環境でビルドを再現し、そのうえで、サポート対象のディストリビューションバージョンが spec files にパッチを適用せずに動作することを検証してください。