Python 3.14 Support

[rtibbles]

❌ This issue is not open for contribution. Visit Contributing guidelines to learn about the contributing process and how to find suitable issues.

Target branch: release-v0.19.x

Desired behavior

Add support for Python 3.14

Current behavior

Python 3.14 is explicitly not supported.

Value add

Newer OSes that come with Python 3.14 as default will be supported.

Possible tradeoffs

A lot of our dependencies do not have explicit support for Python 3.14, because we are pinned to versions that still support Python 3.6, so we may need to add additional monkey patching to handle removed APIs in the Python standard library.