Add auth spans and remove deduplication code for scopes (#89804)

Adds more spans for timing in accesscontrol and remove permission deduplicating code after benchmarking

---------

Signed-off-by: Dave Henderson <dave.henderson@grafana.com>
Co-authored-by: Dave Henderson <dave.henderson@grafana.com>
Co-authored-by: Ieva <ieva.vasiljeva@grafana.com>

pkg/services/dashboards/database/database_folder_test.go

@@ -288,7 +288,7 @@ func TestIntegrationDashboardInheritedFolderRBAC(t *testing.T) {
 			UserID:  u.ID,
 			OrgID:   u.OrgID,
 			OrgRole: org.RoleAdmin,
-			Permissions: map[int64]map[string][]string{u.OrgID: accesscontrol.GroupScopesByAction([]accesscontrol.Permission{
+			Permissions: map[int64]map[string][]string{u.OrgID: accesscontrol.GroupScopesByActionContext(context.Background(), []accesscontrol.Permission{
 				{
 					Action: dashboards.ActionFoldersCreate,
 				}, {