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/legacy-plugin-chart-chord/src/controlPanel.ts

@@ -16,8 +16,12 @@
  * specific language governing permissions and limitations
  * under the License.
  */
-import { t, validateNonEmpty } from '@superset-ui/core';
-import { ControlPanelConfig, sections } from '@superset-ui/chart-controls';
+import { ensureIsArray, t, validateNonEmpty } from '@superset-ui/core';
+import {
+  ControlPanelConfig,
+  getStandardizedControls,
+  sections,
+} from '@superset-ui/chart-controls';
 
 const config: ControlPanelConfig = {
   controlPanelSections: [
@@ -69,6 +73,16 @@ const config: ControlPanelConfig = {
       description: t('Choose a target'),
     },
   },
+  formDataOverrides: formData => {
+    const groupby = getStandardizedControls()
+      .popAllColumns()
+      .filter(col => !ensureIsArray(formData.columns).includes(col));
+    return {
+      ...formData,
+      groupby,
+      metric: getStandardizedControls().shiftMetric(),
+    };
+  },
 };
 
 export default config;