Mark grpc data source timeouts as cancelled queries (#100573)

* Set up to reproduce issue locally

* add check for deadline exceeded

* Revert "Set up to reproduce issue locally"

This reverts commit d8d9b354ca.

* Trigger build

---------

Co-authored-by: Will Browne <will.browne@grafana.com>

pkg/plugins/instrumentationutils/request_status.go

@@ -35,7 +35,7 @@ func RequestStatusFromError(err error) RequestStatus {
 		status = RequestStatusError
 		if errors.Is(err, context.Canceled) {
 			status = RequestStatusCancelled
-		} else if s, ok := grpcstatus.FromError(err); ok && s.Code() == grpccodes.Canceled {
+		} else if s, ok := grpcstatus.FromError(err); ok && s.Code() == grpccodes.Canceled || s.Code() == grpccodes.DeadlineExceeded {
 			status = RequestStatusCancelled
 		}
 	}