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>

plugin/scheduler/plugin.go

@@ -13,7 +13,8 @@ type PluginsJobInterfaceImpl struct {
 }
 
 func init() {
-	app.RegisterJobsPluginsJobInterface(func(a *app.App) tjobs.PluginsJobInterface {
+	app.RegisterJobsPluginsJobInterface(func(s *app.Server) tjobs.PluginsJobInterface {
+		a := app.New(app.ServerConnector(s))
 		return &PluginsJobInterfaceImpl{a}
 	})
 }