[AI Generated] perf(ntttcp): run ntttcp/lagscope over internal IPv4 on dual-stack (use_ipv6) - #4601

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v2, actions/setup-python@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/