Related issue
https://github.com/longhorn/longhorn/issues/2821 https://github.com/longhorn/longhorn/issues/4038
Test gRPC proxy
Given Longhorn exist in the cluster.
And Monitoring stack exist in the cluster.
When Execute longhorn_instance_manager_proxy_grpc_connection in Prometheus UI.
Then Metric data shows in Prometheus UI.
When Monitor longhorn_instance_manager_proxy_grpc_connection in Grafana UI Panel.
And Run automation regression.
Then Connections should return to 0 when tests complete.