simplify CI with prerelease python flag

[bckohan]

No description provided.

[Copilot]

Pull Request Overview

This PR simplifies CI configuration by leveraging the allow-prereleases flag in GitHub Actions to handle Python 3.14 testing instead of manually specifying release candidate versions.

• Replaces explicit Python 3.14 release candidate version (3.14.0-rc.3) with stable version string (3.14) across all test matrices
• Adds allow-prereleases: true to all actions/setup-python steps to enable prerelease Python versions
• Updates test matrices in lint workflow to include Python 3.11 and 3.14 with appropriate exclusions

Reviewed Changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated no comments.

File	Description
.github/workflows/test.yml	Updates Python version matrices and adds prerelease flag to setup-python actions
.github/workflows/lint.yml	Expands Python version matrix and adds prerelease flag support

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