compiler: add retry loop and enable allowEmptyChecksums on Windows (v1.82.x backport) - #12987

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