[Release / DO NOT MERGE] Update release tests to Python 3.14

[pseudo-rnd-thoughts]

[DO NOT MERGE]

Description

Testing all the release tests with Python 3.14

All nightly core, clusters, data, ml are passing with only a single tune related bug.
Next: serve test, most tests pass though we need to update the anyscale cli's pydantic implementation to be compatible with 3.14

we can't test llm as cuda-tile hasn't got 3.14 tests yet (May 22nd)

[gemini-code-assist]

Code Review

This pull request updates the Python version for various release tests from 3.10 or 3.12 to 3.14. The reviewer identified several critical issues: Python 3.14 is not yet a released version, suggesting a widespread typo, and the change introduces incompatibilities with existing Python 3.12 lockfiles and specialized Docker images used in the testing infrastructure.

[aslonnie]

(skipping review on draft pr)

[cursor]

Cursor Bugbot has reviewed your changes and found 2 potential issues.

There are 3 total unresolved issues (including 1 from previous review).

^{Reviewed by Cursor Bugbot for commit 25dec9e. Configure here.}

[cursor]

Dockerfile ARG default contains literal quote characters

Low Severity

The default value for FULL_BASE_IMAGE includes literal double-quote characters around $BASE_IMAGE, producing a malformed image name like rayproject/ray:nightly"value". While this default is always overridden by the wanda build args, the fallback value is syntactically incorrect and could cause confusing failures if someone builds this Dockerfile standalone.

 

^{Reviewed by Cursor Bugbot for commit 25dec9e. Configure here.}