Fix bug in which APIServerTracing did not work with some egress selectors

Kubernetes-commit: 00bcd6cf01b719d0fddc8331ffecd3de35e8896f

pkg/server/options/tracing.go

@@ -101,12 +101,13 @@ func (o *TracingOptions) ApplyTo(es *egressselector.EgressSelector, c *server.Co
 		if err != nil {
 			return err
 		}
-
+		if egressDialer != nil {
 			otelDialer := func(ctx context.Context, addr string) (net.Conn, error) {
 				return egressDialer(ctx, "tcp", addr)
 			}
 			opts = append(opts, otlptracegrpc.WithDialOption(grpc.WithContextDialer(otelDialer)))
 		}
+	}
 
 	resourceOpts := []resource.Option{
 		resource.WithAttributes(