Update CI workflows for current GitHub runners - #323

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Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/cache@v4, actions/checkout@v4, actions/setup-python@v5, codecov/codecov-action@v3. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

This action is deprecated and will be removed in a future release. Please use the sonarqube-scan-action action instead. The sonarqube-scan-action is a drop-in replacement for this action.