fix(tools): complete generic shared runtime source selection - #816

Canceling since a higher priority waiting request for wave-ci-Wave CI-refs/pull/816/merge exists

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. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/