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>

web/webhook_test.go

@@ -232,7 +232,7 @@ func TestIncomingWebhook(t *testing.T) {
 	})
 
 	t.Run("ChannelLockedWebhook", func(t *testing.T) {
-		channel, err := th.App.CreateChannel(&model.Channel{TeamId: th.BasicTeam.Id, Name: model.NewId(), DisplayName: model.NewId(), Type: model.CHANNEL_OPEN, CreatorId: th.BasicUser.Id}, true)
+		channel, err := th.App.CreateChannel(th.Context, &model.Channel{TeamId: th.BasicTeam.Id, Name: model.NewId(), DisplayName: model.NewId(), Type: model.CHANNEL_OPEN, CreatorId: th.BasicUser.Id}, true)
 		require.Nil(t, err)
 
 		hook, err := th.App.CreateIncomingWebhookForChannel(th.BasicUser.Id, th.BasicChannel, &model.IncomingWebhook{ChannelId: th.BasicChannel.Id, ChannelLocked: true})