service: use DialContext in custom dialer

Currently, the custom dialer ignores the context it is passed to. Let's
switch to using DialContext, so that we properly propagate it. This
mimics also the default behavior when no custom dialer is configured [1].

[1] vendor/google.golang.org/grpc/internal/transport/http2_client.go:179

Signed-off-by: Marco Iorio <marco.iorio@isovalent.com>

pkg/k8s/service.go

@@ -728,6 +728,6 @@ func CreateCustomDialer(b ServiceIPGetter, log *logrus.Entry, verboseLogs bool)
 		}
 
 		log.Debugf("Custom dialer based on k8s service backend is dialing to %q", s)
-		return net.Dial("tcp", s)
+		return (&net.Dialer{}).DialContext(ctx, "tcp", s)
 	}
 }