gh-146410: Add --pythoninfo to make testios

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Add --pythoninfo option to dump build information.

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

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The iOS ARM64 Simulator 3.x buildbot runs the make testios command to run the test suite. It should also dump the Python build information using the new test --pythoninfo option.

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cc @freakboy3742

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It works as expected, build information are logged properly: https://buildbot.python.org/#/builders/1380/builds/6161

Python build information
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...
os.uname: posix.uname_result(sysname='Darwin', nodename='ip-10-0-98-195.ec2.internal', release='24.6.0', version='Darwin Kernel Version 24.6.0: Wed Nov  5 21:33:59 PST 2025; root:xnu-11417.140.69.705.2~1/RELEASE_ARM64_T8112', machine='arm64')
platform.architecture: 64bit
platform.platform: iOS-18.3.1-arm64-64bit
...