Bump google.golang.org/grpc from 1.78.0 to 1.82.1 in /control-operator - #811

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-go@v2, arduino/setup-protoc@v3. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/