Move config store into Platform Service (#20718)

* update config methods

cmd/mattermost/commands/init.go

@@ -42,9 +42,10 @@ func initDBCommandContext(configDSN string, readOnlyConfigStore bool) (*app.App,
 	model.AppErrorInit(i18n.T)
 
 	s, err := app.NewServer(
+		// The option order is important as app.Config option reads app.StartMetrics option.
+		app.StartMetrics,
 		app.Config(configDSN, readOnlyConfigStore, nil),
 		app.StartSearchEngine,
-		app.StartMetrics,
 	)
 	if err != nil {
 		return nil, err

cmd/mattermost/commands/server.go

@@ -65,11 +65,12 @@ func runServer(configStore *config.Store, interruptChan chan os.Signal) error {
 	debug.SetTraceback("crash")
 
 	options := []app.Option{
+		// The option order is important as app.Config option reads app.StartMetrics option.
+		app.StartMetrics,
 		app.ConfigStore(configStore),
 		app.RunEssentialJobs,
 		app.JoinCluster,
 		app.StartSearchEngine,
-		app.StartMetrics,
 	}
 	server, err := app.NewServer(options...)
 	if err != nil {