feat(explore): Apply denormalization to tier 2 charts form data (#20524)

* feat(explore): Denormalize form data in Calendar Heatmap

* feat(explore): Denormalize form data in Bubble

* feat(explore): Denormalize form data in Chord

* Dimensions -> Dimension for single selection

* feat(explore): Denormalize form data in Country Map

* feat(explore): Denormalize form data in Heatmap

* feat(explore): Denormalize form data in Histogram

* feat(explore): Denormalize form data in Handlebars

* feat(explore): Denormalize form data in Percent Change

* Use new standardized form data interface

superset-frontend/plugins/plugin-chart-handlebars/src/plugin/controlPanel.tsx

@@ -19,6 +19,7 @@
 import {
   ControlPanelConfig,
   emitFilterControl,
+  getStandardizedControls,
   sections,
 } from '@superset-ui/chart-controls';
 import { addLocaleData, t } from '@superset-ui/core';
@@ -78,6 +79,11 @@ const config: ControlPanelConfig = {
       ],
     },
   ],
+  formDataOverrides: formData => ({
+    ...formData,
+    groupby: getStandardizedControls().popAllColumns(),
+    metrics: getStandardizedControls().popAllMetrics(),
+  }),
 };
 
 export default config;