Fix log mock

Signed-off-by: Thomas Thornton <thomaswilliamthornton@gmail.com>

Author: twthorn

go/vt/vttablet/tabletmanager/vreplication/vplayer_flaky_test.go

@@ -3668,16 +3668,18 @@ func TestPlayerStalls(t *testing.T) {
 	defer deleteTablet(addTablet(100))
 
 	// We want to check for the expected log messages.
-	ole := log.Errorf
+	ole := log.Error
 	logger := logutil.NewMemoryLogger()
-	log.Errorf = logger.Errorf
+	log.Error = func(args ...any) {
+		logger.Errorf("%s", fmt.Sprint(args...))
+	}
 
 	oldMinimumHeartbeatUpdateInterval := vreplicationMinimumHeartbeatUpdateInterval
 	oldProgressDeadline := vplayerProgressDeadline
 	oldRelayLogMaxItems := vttablet.DefaultVReplicationConfig.RelayLogMaxItems
 	oldRetryDelay := vttablet.DefaultVReplicationConfig.RetryDelay
 	defer func() {
-		log.Errorf = ole
+		log.Error = ole
 		vreplicationMinimumHeartbeatUpdateInterval = oldMinimumHeartbeatUpdateInterval
 		vplayerProgressDeadline = oldProgressDeadline
 		vttablet.DefaultVReplicationConfig.RelayLogMaxItems = oldRelayLogMaxItems