TUN-3375: Upgrade coredns and prometheus dependencies

vendor/google.golang.org/grpc/connectivity/connectivity.go

@@ -27,6 +27,8 @@ import (
 	"google.golang.org/grpc/grpclog"
 )
 
+var logger = grpclog.Component("core")
+
 // State indicates the state of connectivity.
 // It can be the state of a ClientConn or SubConn.
 type State int
@@ -44,7 +46,7 @@ func (s State) String() string {
 	case Shutdown:
 		return "SHUTDOWN"
 	default:
-		grpclog.Errorf("unknown connectivity state: %d", s)
+		logger.Errorf("unknown connectivity state: %d", s)
 		return "Invalid-State"
 	}
 }