FieldOverrides: Move FieldConfigSource from fieldOptions to PanelModel.fieldConfig (#22600)

* Apply field overrides in PanelChrome

* Move applyFieldOverrides to panel query runner

* Review updates

* Make sure overrides are applied back on souce panel when exiting the new edit mode

* TS ignores in est

* Make field display work in viz repeater

* Review updates

* Review and test updates

* Change the way overrides and trransformations are retrieved in PQR

* Add fieldConfig property to PanelModel

* Dashboard migration v1

* Use field config when exiting new panel edit mode

* Gauge - use fieldConfig from panel model

* FieldDisplayOptions - don's extend FieldConfigSource

* Fix fieldDisplay ts

* StatPanel updated

* Stat panel defaults applied

* Table2 panel options  update

* React graph updates

* BarGauge updated

* PieChart, Gauge, BarGauge and Stat updates

* PieChart - remove field config defaults from options

* FieldDisplayEditor - remove unused methos

* PanelModel - remove debugger

* Remove fieldConfig from field options when migrating dashboard

* Update data links migrations

* Update fieldDisaplay tests to respect new fieldConfig

* Update dashboard schema version in snapshots

* Fix BarGaugePanel test

* Rebase fixes

* Add onFieldConfigChange to PanelProps type

* Update shared single stat migration

* Pass PanelModel instead of options only for panel type change handler [breaking]

* Renames

* Don't mutate panel options

* Migrations update

* Remove obsolete snap

* Minor updates after review

* Fix null checks

* Temporarily (until we decide to switch to new pane edit) bring back old aditors

* Temporarily rename ValueMappingEditor and MappingRow to Legacy*

* Migrations update

* Updae setFieldConfigDefaults API

* Update the way field config defaults are applied

* Use standard field config for gauge, bar gauge and stat panels

* refactoring

* Revert dashboard fieldOptions migrations as those are handled by single stat migrator

* Fix ts in tests

* Strict null fix and some minor fixes

Co-authored-by: Torkel Ödegaard <torkel@grafana.com>

public/app/features/dashboard/state/PanelModel.test.ts

@@ -1,6 +1,6 @@
 import { PanelModel } from './PanelModel';
 import { getPanelPlugin } from '../../plugins/__mocks__/pluginMocks';
-import { PanelProps } from '@grafana/data';
+import { ConfigOverrideRule, PanelProps } from '@grafana/data';
 import { ComponentClass } from 'react';
 
 class TablePanelCtrl {}
@@ -53,9 +53,31 @@ describe('PanelModel', () => {
         showColumns: true,
         targets: [{ refId: 'A' }, { noRefId: true }],
         options: persistedOptionsMock,
+        fieldConfig: {
+          defaults: {
+            unit: 'mpg',
+          },
+          overrides: [
+            {
+              matcher: {
+                id: '1',
+                options: {},
+              },
+              properties: [],
+            },
+          ],
+        },
       };
 
       model = new PanelModel(modelJson);
+      const overrideMock: ConfigOverrideRule = {
+        matcher: {
+          id: '2',
+          options: {},
+        },
+        properties: [],
+      };
+
       const panelPlugin = getPanelPlugin(
         {
           id: 'table',
@@ -64,6 +86,13 @@ describe('PanelModel', () => {
         TablePanelCtrl // angular
       );
       panelPlugin.setDefaults(defaultOptionsMock);
+      panelPlugin.setFieldConfigDefaults({
+        defaults: {
+          unit: 'flop',
+          decimals: 2,
+        },
+        overrides: [overrideMock],
+      });
       model.pluginLoaded(panelPlugin);
     });
 
@@ -79,6 +108,17 @@ describe('PanelModel', () => {
       expect(model.getOptions().arrayWith2Values.length).toBe(1);
     });
 
+    it('should merge override field config options', () => {
+      expect(model.getFieldOverrideOptions().fieldOptions.overrides.length).toBe(2);
+    });
+
+    it('should apply field config defaults', () => {
+      // default unit is overriden by model
+      expect(model.getFieldOverrideOptions().fieldOptions.defaults.unit).toBe('mpg');
+      // default decimals are aplied
+      expect(model.getFieldOverrideOptions().fieldOptions.defaults.decimals).toBe(2);
+    });
+
     it('should set model props on instance', () => {
       expect(model.showColumns).toBe(true);
     });