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/websocket_router.go

@@ -25,8 +25,6 @@ func (wr *WebSocketRouter) Handle(action string, handler webSocketHandler) {
 }
 
 func (wr *WebSocketRouter) ServeWebSocket(conn *WebConn, r *model.WebSocketRequest) {
-	wr.app.InitServer()
-
 	if r.Action == "" {
 		err := model.NewAppError("ServeWebSocket", "api.web_socket_router.no_action.app_error", nil, "", http.StatusBadRequest)
 		returnWebSocketError(wr.app, conn, r, err)