[MM-15275] Migrate "Team.Save" to Sync (#10695)

* [MM-15275] Migrate "Team.Save" to Sync

* review comments

* resolve merge conflicts

* fix ci

* merge error

* merge error

* fix failed test

* address code review

* review comments

app/team.go

@@ -24,11 +24,10 @@ import (
 
 func (a *App) CreateTeam(team *model.Team) (*model.Team, *model.AppError) {
 	team.InviteId = ""
-	result := <-a.Srv.Store.Team().Save(team)
-	if result.Err != nil {
-		return nil, result.Err
+	rteam, err := a.Srv.Store.Team().Save(team)
+	if err != nil {
+		return nil, err
 	}
-	rteam := result.Data.(*model.Team)
 
 	if _, err := a.CreateDefaultChannels(rteam.Id); err != nil {
 		return nil, err