* feat: Worker Connectivity Health Check
Add worker upstream connection state. API calls to the worker's ops `/heath?worker_info=1` endpoint should now return a new filed called `upstream_connection_state`
```
{
"worker_process_info":{
"state":"active",
"active_session_count":0,
"upstream_connection_state":"READY"
}
}
```
The states returned will be GRPC connection states: https://grpc.github.io/grpc/core/md_doc_connectivity-semantics-and-api.html
There could be multiple upstream addresses but GRPC manual resolver determines the state of the connection.
Michael LiandElim Tsiagbey
Jeff MitchellandDamian Debkowski