[PLT-5864] Move teammate name display setting to the System Console (#6681)

* move teammate name display setting to the system console

* update all the likes of TeammateNameDisplay names

* fix gofmt error

* rebase and fix conflict

app/team.go

@@ -657,7 +657,8 @@ func InviteNewUsersToTeam(emailList []string, teamId, senderId string) *model.Ap
 		user = result.Data.(*model.User)
 	}
 
-	SendInviteEmails(team, user.GetDisplayName(), emailList, utils.GetSiteURL())
+	nameFormat := *utils.Cfg.TeamSettings.TeammateNameDisplay
+	SendInviteEmails(team, user.GetDisplayName(nameFormat), emailList, utils.GetSiteURL())
 
 	return nil
 }