gh-118710: IPv*Address class properties

[nineteendo]

• Issue: Make IPv{4,6}Address.version and max_prefixlen available on classes, not just instances #118710

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📚 Documentation preview 📚: library/ipaddress.html#ipaddress.IPv4Address.version

[gpshead]

Please add .. versionchanged:: 3.14 annotations to the Doc/library/ipaddress.rst description of these attributes mentioning that they are now available on the class as well as instances.

[bedevere-app]

A Python core developer has requested some changes be made to your pull request before we can consider merging it. If you could please address their requests along with any other requests in other reviews from core developers that would be appreciated.

Once you have made the requested changes, please leave a comment on this pull request containing the phrase I have made the requested changes; please review again. I will then notify any core developers who have left a review that you're ready for them to take another look at this pull request.

[nineteendo]

gpshead, I have made the requested changes; please review again.

[bedevere-app]

Thanks for making the requested changes!

@gpshead: please review the changes made to this pull request.

The requested change was made.

[encukou]

Looks good, thank you!