Migrate to stateless app.App (#17542)

* add request context

* move initialialization to server

* use app interface instead of global app functions

* remove app context from webconn

* cleanup

* remove duplicated services

* move context to separate package

* remove finalize init method and move content to NewServer function

* restart workers and schedulers after adding license for tests

* reflect review comments

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

app/plugin_statuses.go

@@ -71,13 +71,17 @@ func (a *App) GetPluginStatuses() (model.PluginStatuses, *model.AppError) {
 
 // GetClusterPluginStatuses returns the status for plugins installed anywhere in the cluster.
 func (a *App) GetClusterPluginStatuses() (model.PluginStatuses, *model.AppError) {
-	pluginStatuses, err := a.GetPluginStatuses()
+	return a.Srv().getClusterPluginStatuses()
+}
+
+func (s *Server) getClusterPluginStatuses() (model.PluginStatuses, *model.AppError) {
+	pluginStatuses, err := s.GetPluginStatuses()
 	if err != nil {
 		return nil, err
 	}
 
-	if a.Cluster() != nil && *a.Config().ClusterSettings.Enable {
-		clusterPluginStatuses, err := a.Cluster().GetPluginStatuses()
+	if s.Cluster != nil && *s.Config().ClusterSettings.Enable {
+		clusterPluginStatuses, err := s.Cluster.GetPluginStatuses()
 		if err != nil {
 			return nil, model.NewAppError("GetClusterPluginStatuses", "app.plugin.get_cluster_plugin_statuses.app_error", nil, err.Error(), http.StatusInternalServerError)
 		}
@@ -88,8 +92,8 @@ func (a *App) GetClusterPluginStatuses() (model.PluginStatuses, *model.AppError)
 	return pluginStatuses, nil
 }
 
-func (a *App) notifyPluginStatusesChanged() error {
-	pluginStatuses, err := a.GetClusterPluginStatuses()
+func (s *Server) notifyPluginStatusesChanged() error {
+	pluginStatuses, err := s.getClusterPluginStatuses()
 	if err != nil {
 		return err
 	}
@@ -98,7 +102,7 @@ func (a *App) notifyPluginStatusesChanged() error {
 	message := model.NewWebSocketEvent(model.WEBSOCKET_EVENT_PLUGIN_STATUSES_CHANGED, "", "", "", nil)
 	message.Add("plugin_statuses", pluginStatuses)
 	message.GetBroadcast().ContainsSensitiveData = true
-	a.Publish(message)
+	s.Publish(message)
 
 	return nil
 }