test(processtree): cover reparenting strategy selection and fallbacks - #1045

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@11d5960a326750d5838078e36cf38b85af677262, actions/setup-go@40f1582b2485089dde7abd97c1529aa768e1baff, actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065, actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02, peter-evans/create-or-update-comment@71345be0265236311c031f5c7866368bd1eff043. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/