Variables: Support static keys in AdHocFiltersVariable (#83157)

* initial start

* don't use getTagKeysProvider

* some cleanup

* undo kinds adjustment

* simplify

* remove async declaration

* add description and a couple of unit tests

* add transformSaveModelToScene test

* add tests for AdHocVariableForm

* add tests for AdHocFiltersVariableEditor

* update to defaultKeys

* fix snapshots

* update to 3.13.3

packages/grafana-data/src/types/templateVars.ts

@@ -1,4 +1,5 @@
 import { LoadingState } from './data';
+import { MetricFindValue } from './datasource';
 import { DataSourceRef } from './query';
 
 export type VariableType = TypedVariableModel['type'];
@@ -63,6 +64,10 @@ export interface AdHocVariableModel extends BaseVariableModel {
    * Filters that are always applied to the lookup of keys. Not shown in the AdhocFilterBuilder UI.
    */
   baseFilters?: AdHocVariableFilter[];
+  /**
+   * Static keys that override any dynamic keys from the datasource.
+   */
+  defaultKeys?: MetricFindValue[];
 }
 
 export interface GroupByVariableModel extends VariableWithOptions {

packages/grafana-e2e-selectors/src/selectors/pages.ts

@@ -195,6 +195,7 @@ export const Pages = {
           AdHocFiltersVariable: {
             datasourceSelect: Components.DataSourcePicker.inputV2,
             infoText: 'data-testid ad-hoc filters variable info text',
+            modeToggle: 'data-testid ad-hoc filters variable mode toggle',
           },
         },
       },