feat(plugin-chart-echarts): [feature-parity] support extra control for the area chart V2 (#16493)

* feat(echarts): [feature-parity] support extra control

* add extra control for plugin

* refactor: extract ExtraControl

* fix: lint

* fix some problems

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

@@ -190,7 +190,7 @@ export default function transformProps(
       areaOpacity: opacity,
       seriesType,
       showValue,
-      stack,
+      stack: Boolean(stack),
       yAxisIndex,
       filterState,
       seriesKey: entry.name,
@@ -207,7 +207,7 @@ export default function transformProps(
       areaOpacity: opacityB,
       seriesType: seriesTypeB,
       showValue: showValueB,
-      stack: stackB,
+      stack: Boolean(stackB),
       yAxisIndex: yAxisIndexB,
       filterState,
       seriesKey: primarySeries.has(entry.name as string)