[ML] fix tooltip content for scheduled events (#75973)

Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com>

Author: darnautov

x-pack/plugins/ml/public/application/components/chart_tooltip/chart_tooltip.tsx

@@ -72,6 +72,11 @@ const Tooltip: FC<{ service: ChartTooltipService }> = React.memo(({ service }) =
                     /* eslint @typescript-eslint/camelcase:0 */
                     echTooltip__rowHighlighted: isHighlighted,
                   });
+
+                  const renderValue = Array.isArray(value)
+                    ? value.map((v) => <div key={v}>{v}</div>)
+                    : value;
+
                   return (
                     <div
                       key={`${seriesIdentifier.key}__${valueAccessor}`}
@@ -88,7 +93,7 @@ const Tooltip: FC<{ service: ChartTooltipService }> = React.memo(({ service }) =
                           {label}
                         </EuiFlexItem>
                         <EuiFlexItem className="eui-textBreakAll mlChartTooltip__value">
-                          {value}
+                          {renderValue}
                         </EuiFlexItem>
                       </EuiFlexGroup>
                     </div>

x-pack/plugins/ml/public/application/explorer/explorer_charts/explorer_chart_single_metric.js

@@ -37,7 +37,6 @@ import {
 } from '../../util/chart_utils';
 import { LoadingIndicator } from '../../components/loading_indicator/loading_indicator';
 import { getTimeBucketsFromCache } from '../../util/time_buckets';
-import { mlEscape } from '../../util/string_utils';
 import { mlFieldFormatService } from '../../services/field_format_service';
 
 import { i18n } from '@kbn/i18n';
@@ -488,7 +487,7 @@ export class ExplorerChartSingleMetric extends React.Component {
           label: i18n.translate('xpack.ml.explorer.singleMetricChart.scheduledEventsLabel', {
             defaultMessage: 'Scheduled events',
           }),
-          value: marker.scheduledEvents.map(mlEscape).join('<br/>'),
+          value: marker.scheduledEvents,
           seriesIdentifier: {
             key: seriesKey,
           },