[release-6.6]fix(cve) bumb go-grpc to 1.83.2 to fix CVE-2026-84445 - #3468

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/