New sysconfig API: Build information - Compatibility

[FFY00]

Feature or enhancement

sysconfig should provide the core compatibility information for interpreter.

Pitch

The new API would provide:

• PEP 425 compatibility tags
  • currently: Need to be manually calculated by users (eg. packaging.extensions)
• Supported module extensions
  • currently: importlib.machinery.*_EXTENSIONS
• what else? please comment...

Considerations

IMO we probably should only provide the general platform tag (eg. linux-x86_64), and leave standardized environment tags (eg. manylinux) for 3rd party tooling.

Previous discussion

Issue asking for PEP 425 tags: GH-99560

New sysconfig API meta-issue: GH-103480