[3.13] gh-146410: Add --pythoninfo option to regrtest (GH-146413)

[miss-islington]

• Android now runs tests with --pythoninfo to dump build information.
• Add display_title() function.
  (cherry picked from commit b5a27bd)

Co-authored-by: Victor Stinner vstinner@python.org

• Issue: Android/iOS buildbot should run python -m test.pythoninfo #146410

[encukou]

@Yhg1s, would you be comfortable merging this (and then #158605) to 3.13, so we get more info from the Android buildbot?

[encukou]

The info shows up in CI: https://github.com/python/cpython/actions/runs/37787642126/job/113346741270?pr=159025

[freakboy3742]

@Yhg1s, would you be comfortable merging this (and then #158605) to 3.13, so we get more info from the Android buildbot?

The more general case of this is a discussion worth having at the core sprint - what is the policy going forward on changes that are needed to keep the buildbot working that aren't strictly "security" related? We need to update the Android/iOS SDKs in order to produce binaries that are valid for the various app stores; but that sometimes requires config changes to Xcode/Gradle configurations. This hasn't been a problem historically because 3.13 is the first release that had iOS/Android support, so this will be the first iOS/Android-supporting release that is in security-fix-only state.

[Yhg1s]

Changes to the build infrastructure and even the tests, if appropriately scoped, are fine for 3.13 (and 3.12) as far as I'm concerned. We can start a discussion on what the policy should be at the sprint.