[search] Legacy search fallback support legacy query params (#99765)

* add support for deleted query param

* support tag query param in modes 2 and below

* handle dashboardIds

* hhandle dashboardUIDs

* handle folderUIDs query param

* handle page query param when hitting legacy storage

* handle sort query param

* handle type query param

* re-enable search fallback

* remove folder search workaround and fix /api/search to return both folders and dashboards when no title or type is provided

---------

Co-authored-by: Stephanie Hingtgen <stephanie.hingtgen@grafana.com>

pkg/services/search/service.go

@@ -11,7 +11,6 @@ import (
 	"github.com/grafana/grafana/pkg/services/featuremgmt"
 	"github.com/grafana/grafana/pkg/services/folder"
 	"github.com/grafana/grafana/pkg/services/search/model"
-	"github.com/grafana/grafana/pkg/services/sqlstore/searchstore"
 	"github.com/grafana/grafana/pkg/services/star"
 	"github.com/grafana/grafana/pkg/services/user"
 	"github.com/grafana/grafana/pkg/setting"
@@ -114,20 +113,6 @@ func (s *SearchService) SearchHandler(ctx context.Context, query *Query) (model.
 		dashboardQuery.Sort = sortOpt
 	}
 
-	// if folders are stored in unified storage, we need to use the folder service to query for folders
-	if s.features.IsEnabledGlobally(featuremgmt.FlagKubernetesFoldersServiceV2) && (query.Type == searchstore.TypeFolder || query.Type == searchstore.TypeAlertFolder) {
-		hits, err := s.folderService.SearchFolders(ctx, folder.SearchFoldersQuery{
-			OrgID:        query.OrgId,
-			UIDs:         query.FolderUIDs,
-			IDs:          query.FolderIds,
-			Title:        query.Title,
-			Limit:        query.Limit,
-			SignedInUser: query.SignedInUser,
-		})
-
-		return sortedHits(hits), err
-	}
-
 	hits, err := s.dashboardService.SearchDashboards(ctx, &dashboardQuery)
 	if err != nil {
 		return nil, err