Summary of Changes

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This pull request focuses on modernizing the Python environment within the project's examples. It systematically removes outdated Python 3.9 configurations and introduces support for newer Python versions, specifically 3.12, 3.13, and 3.14. The changes update default versions and expand the range of supported Python environments, ensuring the examples remain relevant and functional with current Python releases.

Highlights

• Python 3.9 Deprecation: Removed all explicit references and configurations for Python 3.9 across various Bazel files, including MODULE.bazel, WORKSPACE, BUILD.bazel, and requirements_lock files, to streamline and update the example configurations.
• Python Version Updates: Updated the default Python version in the multi_python_versions example from 3.9 to 3.10, ensuring the examples align with more current Python releases.
• New Python Version Support: Added comprehensive configurations and support for Python versions 3.12, 3.13, and 3.14 in the multi_python_versions example. This includes defining new toolchains, pip parsing rules, and test targets for these versions.
• Cleanup of Unused Code: Eliminated redundant variable definitions and use_repo calls related to Python 3.9 in examples/bzlmod/other_module/MODULE.bazel, contributing to a cleaner and more maintainable codebase.

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