It's possible for some container engines to report their versions with a dash (e.g., "4.9.4-rhel"), which breaks packaging.version.Version's ability to parse the string. This commit introduces a version_from_string method which santizies the version string and returns an instance of Version.

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Also, lift the method up and prefix with a "_" to better match the existing conventions

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Use the "podman --version" command instead of "podman version -f {{json .}}" for better reliability across distributions.

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Lower Docker API check to 1.41
Podman versions are not PEP440 compliant, remove distro specific suffixes before parsing.
Add tests with real-world outputs and some made up ones.

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