[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

utils/config.go

@@ -411,6 +411,7 @@ func getClientConfig(c *model.Config) map[string]string {
 	props["RestrictPublicChannelDeletion"] = *c.TeamSettings.RestrictPublicChannelDeletion
 	props["RestrictPrivateChannelDeletion"] = *c.TeamSettings.RestrictPrivateChannelDeletion
 	props["RestrictPrivateChannelManageMembers"] = *c.TeamSettings.RestrictPrivateChannelManageMembers
+	props["TeammateNameDisplay"] = *c.TeamSettings.TeammateNameDisplay
 
 	props["EnableOAuthServiceProvider"] = strconv.FormatBool(c.ServiceSettings.EnableOAuthServiceProvider)
 	props["GoogleDeveloperKey"] = c.ServiceSettings.GoogleDeveloperKey