* Introduce WebSocket-based RPC v2
* go test: add -ldflags="-B gobuildid"
* No need to change the "controller.workerNotifier.Notify()" error message
* No need to modify Protocol Buffers/gRPC generated code
* rpcWatch(): explain that connection shouldn't be normally be closed
* Avoid "port forwarding failed: " repetition in error messages
* Improve comments and avoid repetition in IP resolution errors
* Port forwarding support
* .golangci.yml: remove and replace deprecated and archived linters
* Client: pass credentials when calling WebSocket API methods
* API: require ServiceAccountRoleComputeWrite role for port forwarding
* Use Buf
* Rename Poll() RPC method to Watch()
* Split Rendezvous into two parts: Watcher and Proxy (#32)
* Split Rendezvous into two parts: Watcher and Proxy
* Implement Proxy cancellation
* Use Protocol Buffers structure directly in Watcher
* Fix TestWatcher after switching to Protocol Buffers structure
* portForwardVM(): ensure we also check for gin's context