Search API: Search by folder UID (#65040)

* Search: Attempt to support folderUID filter

* Search: Use folder UID instead of ID for searching folders

* Update swagger

* Fix JSON property casing

* Add integration test

* Remove redundant query condition

* Fix frontend test

* Fix listing dashboards in General/root

* Add support for fetching top level folders

using `folderUIDs=` (empty string) query parameter

* Add deprecation notice

* Send uid of general in sql.ts

* Use 'general' for query folderUIDs query param for fetching folder

* Add tests

* Fix FolderUIDFilter

---------

Co-authored-by: Sofia Papagiannaki <1632407+papagian@users.noreply.github.com>

pkg/services/dashboards/database/database.go

@@ -975,10 +975,13 @@ func (d *dashboardStore) FindDashboards(ctx context.Context, query *dashboards.F
 
 	filters = append(filters, query.Filters...)
 
+	var orgID int64
 	if query.OrgId != 0 {
-		filters = append(filters, searchstore.OrgFilter{OrgId: query.OrgId})
+		orgID = query.OrgId
+		filters = append(filters, searchstore.OrgFilter{OrgId: orgID})
 	} else if query.SignedInUser.OrgID != 0 {
-		filters = append(filters, searchstore.OrgFilter{OrgId: query.SignedInUser.OrgID})
+		orgID = query.SignedInUser.OrgID
+		filters = append(filters, searchstore.OrgFilter{OrgId: orgID})
 	}
 
 	if len(query.Tags) > 0 {
@@ -1003,6 +1006,10 @@ func (d *dashboardStore) FindDashboards(ctx context.Context, query *dashboards.F
 		filters = append(filters, searchstore.FolderFilter{IDs: query.FolderIds})
 	}
 
+	if len(query.FolderUIDs) > 0 {
+		filters = append(filters, searchstore.FolderUIDFilter{Dialect: d.store.GetDialect(), OrgID: orgID, UIDs: query.FolderUIDs})
+	}
+
 	var res []dashboards.DashboardSearchProjection
 	sb := &searchstore.Builder{Dialect: d.store.GetDialect(), Filters: filters}