feat: add sort legend to legend section (#34911)

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

@@ -116,6 +116,7 @@ export default function transformProps(
     dateFormat,
     showLabels,
     showLegend,
+    legendSort,
     isCircle,
     columnConfig,
     sliceId,
@@ -354,7 +355,10 @@ export default function transformProps(
     },
     legend: {
       ...getLegendProps(legendType, legendOrientation, showLegend, theme),
-      data: Array.from(columnsLabelMap.keys()),
+      data: Array.from(columnsLabelMap.keys()).sort((a: string, b: string) => {
+        if (!legendSort) return 0;
+        return legendSort === 'asc' ? a.localeCompare(b) : b.localeCompare(a);
+      }),
     },
     series,
     radar: {