Add support for Python 3.14

[lukasz-mitka]

Adds Python 3.14

Follow-up to #2041 with some additional places where python should be updated.

[linux-foundation-easycla]

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• ✅ login: lukasz-mitka / name: Łukasz Mitka (6cfa883)

[wpessers]

LGTM in general. Have you by any chance been able to test this in an actual lambda function with python 3.14, building the layer from source yourself? I don't see any open issues regarding python 3.14 in https://github.com/open-telemetry/opentelemetry-python, nor in https://github.com/open-telemetry/opentelemetry-python-contrib so most likely it should be fine.

[lukasz-mitka]

No, I haven't tested it. Unlikely I will find time to figure out how to do it and then do it.
I will test it once it's available though :)

[wpessers]

LGTM, will try to find some time to do a quick smoke-test myself before merging. Thank you for contributing! 🚀

[serkan-ozal]

Yeah, let's do a quick smoke that to be sure that it works with Python 3.14 in real AWS Lambda environment. OpenTelemetry Python SDK supports Python version 3.9+, so I am not expecting any compatibility issue, but it is still important to verify it (at least with a very basic hello-world like Lambda function).

[wpessers]

Verified with simple aws sdk call to sts, setup available at https://github.com/wpessers/python-otel-smoke-test if anyone would be interested.