[MM-16166] Migrate Team.GetAllPrivateTeamListing to Sync by default (#11103)

* [MM-16166] Migrate Team.GetAllPrivateTeamListing to Sync by default

* Simplifying code

app/team.go

@@ -626,11 +626,7 @@ func (a *App) GetAllTeamsPageWithCount(offset int, limit int) (*model.TeamsWithC
 }
 
 func (a *App) GetAllPrivateTeams() ([]*model.Team, *model.AppError) {
-	result := <-a.Srv.Store.Team().GetAllPrivateTeamListing()
-	if result.Err != nil {
-		return nil, result.Err
-	}
-	return result.Data.([]*model.Team), nil
+	return a.Srv.Store.Team().GetAllPrivateTeamListing()
 }
 
 func (a *App) GetAllPrivateTeamsPage(offset int, limit int) ([]*model.Team, *model.AppError) {