[MM-53156] Remove Multi-Product architecture (#25669)

server/public/model/config.go

@@ -3494,7 +3494,7 @@ type Config struct {
 	DataRetentionSettings     DataRetentionSettings
 	MessageExportSettings     MessageExportSettings
 	JobSettings               JobSettings
-	ProductSettings           ProductSettings
+	ProductSettings           ProductSettings // Deprecated: Remove in next major version:: https://mattermost.atlassian.net/browse/MM-56655
 	PluginSettings            PluginSettings
 	DisplaySettings           DisplaySettings
 	GuestAccountsSettings     GuestAccountsSettings