[ML] Single Metric Viewer: fixes hover functionality in the anomalies…

… table (#182297)

## Summary

Fixes hover functionality for the anomalies table in the Single Metric
Viewer to highlight the corresponding marker in the chart.

Issue mentioned in
#181910 (comment)

x-pack/plugins/ml/public/application/timeseriesexplorer/components/timeseries_chart/timeseries_chart.js

@@ -254,7 +254,7 @@ class TimeseriesChartIntl extends Component {
     }
 
     this.rowMouseenterSubscriber = mlTableService.rowMouseenter$.subscribe(
-      tableRecordMousenterListener
+      tableRecordMousenterListener.bind(this)
     );
     this.rowMouseleaveSubscriber = mlTableService.rowMouseleave$.subscribe(
       tableRecordMouseleaveListener