Commoncode

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- Add new optional argument to generate YAML test data files from a template
- Migrate URLs to new aboutcode.org org
- Drop support for Python 3.7
- Replace charset_normalizer by chardet because of unstable behavior between minor versions
See https://github.com/jawah/charset_normalizer/issues/520
- Adopt black and isort style

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- Remove ``commoncode.system.get_etc_os_release_info`` and replace it with ``commoncode.distro_os_release_parser``.

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- Add ``commoncode.distro.os_release_parser`` from container-inspector to commoncode.

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- Add ``on_macos_arm64`` and ``on_ubuntu_22`` markers to ``commoncode.system``.

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- Mark our use of MD5 as NOT for security 54
- Fix VirtualCodebase walk issue when the root directory name is repeated 57

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- Update requirements in requirements.txt and requirements-dev.txt
- v31.0.1 was uploaded to PyPI without updating requirements.txt and
requirements-dev.txt