Update workflows to latest version

[devin-roffman-emerson]

• This contribution adheres to CONTRIBUTING.md.

What does this Pull Request accomplish?

Updates all GitHub Actions workflows to use modern action versions and Python 3.11 for builds:

• actions/checkout@v2 → @v4 (v2 uses a deprecated Node.js runtime)
• actions/setup-python@v2 → @v5 (v2 cannot reliably install Python 3.11+)
• python-version: 3.6 → 3.11 in publish-pypi, publish-testpypi, and test-build-install workflows
• pypa/gh-action-pypi-publish updated from a pinned 2021 commit hash to release/v1
• lint.yml action versions updated (Python version unchanged at 3.10)

Why should this Pull Request be merged?

• Python 3.6 reached end-of-life in December 2021 and is no longer available in actions/setup-python@v5, which will cause workflow failures.
• actions/checkout@v2 and actions/setup-python@v2 use a deprecated Node.js runtime and will stop working on newer GitHub runners.
• The pinned pypa/gh-action-pypi-publish commit is ~5 years old and missing security fixes.
• The build produces a pure Python wheel (py3-none-any), so building with 3.11 is fully backwards compatible — the wheel installs on any Python >=3.6 as declared in setup.cfg.

What testing has been done?

• I have run the automated tests (required if there are code changes)

No code changes — only CI workflow files were modified. Recommend triggering the TestPyPI publish workflow (workflow_dispatch) after merge to verify end-to-end.