chore(several samples) Updating all instances of Pytest up to version 9.0.3 Part IV

[XrossFox]

• Updated pytest to 9.0.3 for all test requirement files, restricted to Python 3.10 and newer.
• Configured Nox configurations (noxfile_config.py) to test only against Python 3.10 and 3.14, dropping support for older versions.
• Updated Docker-based pipeline tests to exclusively run against Python 3.14 to match container runtime environments.
• Updated Dockerfiles to use Python 3.14 as the base image (python:3.14 and python:3.14-slim).
• Updated system dependencies (apt-get) in Dataflow custom containers to install Python 3.14 packages and correctly link alternatives.
• Updated Apache Beam SDK pulls to use the beam_python3.14_sdk image.

Description

Fixes #

Note: Before submitting a pull request, please open an issue for discussion if you are not associated with Google.

Checklist

• I have followed Sample Guidelines from AUTHORING_GUIDE.MD
• README is updated to include all relevant information
• Tests pass: nox -s py-3.9 (see Test Environment Setup)
• Lint pass: nox -s lint (see Test Environment Setup)
• These samples need a new API enabled in testing projects to pass (let us know which ones)
• These samples need a new/updated env vars in testing projects set to pass (let us know which ones)
• This sample adds a new sample directory, and I updated the CODEOWNERS file with the codeowners for this sample
• This sample adds a new Product API, and I updated the Blunderbuss issue/PR auto-assigner with the codeowners for this sample
• Please merge this PR for me once it is approved

[gemini-code-assist]

Code Review

This pull request upgrades pytest to 9.0.3 for Python versions >= 3.10 and updates various Dockerfiles and Nox configurations to target Python 3.14. However, multiple critical issues were identified because Python 3.14 is currently unreleased and unstable. Using python:3.14 or python:3.14-slim as base images, referencing non-existent Apache Beam SDK images (beam_python3.14_sdk:2.73.0), and ignoring all stable Python versions (3.8 through 3.13) in Nox configurations will cause build and test failures. The feedback strongly recommends reverting to stable Python versions (such as 3.11, 3.12, or 3.13) and adjusting the ignored versions in Nox configurations to ensure a viable test environment.

[XrossFox]

Code Review

This pull request upgrades pytest to 9.0.3 for Python versions >= 3.10 and updates various Dockerfiles and Nox configurations to target Python 3.14. However, multiple critical issues were identified because Python 3.14 is currently unreleased and unstable. Using python:3.14 or python:3.14-slim as base images, referencing non-existent Apache Beam SDK images (beam_python3.14_sdk:2.73.0), and ignoring all stable Python versions (3.8 through 3.13) in Nox configurations will cause build and test failures. The feedback strongly recommends reverting to stable Python versions (such as 3.11, 3.12, or 3.13) and adjusting the ignored versions in Nox configurations to ensure a viable test environment.

The lowest version supported by pytest is Python 3.10, so all tests should be upgraded to run that at minimu. Python 3.14 and apache beam 2.73 have been released and are both, available on pypi and docker hub.

https://pypi.org/project/apache-beam/
https://hub.docker.com/_/python/tags?name=3.14
https://hub.docker.com/r/apache/beam_python3.14_sdk