chore(release): backport #30787, #30788, #31035, #31122, #31133 to stable/1.84.x and cut 1.84.10 - #31169

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830, actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955, actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065, actions/upload-artifact@4cec3d8aa04e39d1a68397de0c4cd6fb9dce8ec1. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/