fix: Reordering echart props to fix confidence interval in Mixed Charts (#30716)

Co-authored-by: Vedant Prajapati <40185967+vedantprajapati@users.noreply.github.com>

superset-frontend/plugins/plugin-chart-echarts/src/Timeseries/transformProps.ts

@@ -80,6 +80,7 @@ import {
   extractForecastValuesFromTooltipParams,
   formatForecastTooltipSeries,
   rebaseForecastDatum,
+  reorderForecastSeries,
 } from '../utils/forecast';
 import { convertInteger } from '../utils/convertInteger';
 import { defaultGrid, defaultYAxis } from '../defaults';
@@ -624,7 +625,7 @@ export default function transformProps(
       ),
       data: legendData as string[],
     },
-    series: dedupSeries(series),
+    series: dedupSeries(reorderForecastSeries(series) as SeriesOption[]),
     toolbox: {
       show: zoomable,
       top: TIMESERIES_CONSTANTS.toolboxTop,