[v10.3.x] NestedFolderPicker: separate toggle to force enable picker without (#80549)

* NestedFolderPicker: separate toggle to force enable picker without `nestedFolders` (#80461)

* separate nestedFolderPickerOverride toggle to force enable it without nestedFolders

* let's call it newFolderPicker

* update unit tests and keyboard handling

* reduce spacing when no folder open chevron

---------

Co-authored-by: Josh Hunt <joshhunt@users.noreply.github.com>
(cherry picked from commit ec53487c99)

* add config import to NestedFolderPicker

pkg/services/featuremgmt/registry.go

@@ -1304,5 +1304,13 @@ var (
 			RequiresRestart: true,
 			Created:         time.Date(2024, time.January, 3, 12, 0, 0, 0, time.UTC),
 		},
+		{
+			Name:         "newFolderPicker",
+			Description:  "Enables the nested folder picker without having nested folders enabled",
+			Stage:        FeatureStageExperimental,
+			Owner:        grafanaFrontendPlatformSquad,
+			FrontendOnly: true,
+			Created:      time.Date(2024, time.January, 12, 12, 0, 0, 0, time.UTC),
+		},
 	}
 )

pkg/services/featuremgmt/toggles_gen.csv

@@ -153,3 +153,4 @@ displayAnonymousStats,GA,@grafana/identity-access-team,2023-11-29,false,false,fa
 alertStateHistoryAnnotationsFromLoki,experimental,@grafana/alerting-squad,2023-11-30,false,false,true,false
 lokiQueryHints,GA,@grafana/observability-logs,2023-12-18,false,false,false,true
 alertingPreviewUpgrade,experimental,@grafana/alerting-squad,2024-01-03,false,false,true,false
+newFolderPicker,experimental,@grafana/grafana-frontend-platform,2024-01-12,false,false,false,true

pkg/services/featuremgmt/toggles_gen.go

@@ -622,4 +622,8 @@ const (
 	// FlagAlertingPreviewUpgrade
 	// Show Unified Alerting preview and upgrade page in legacy alerting
 	FlagAlertingPreviewUpgrade = "alertingPreviewUpgrade"
+
+	// FlagNewFolderPicker
+	// Enables the nested folder picker without having nested folders enabled
+	FlagNewFolderPicker = "newFolderPicker"
 )