Now it is possible to have a configuration,
where only one single dev provider is enabled.

Providers were not registered into Service.authMiddleware.Provicers slice
in the Service.AddDevProvider() and Service.AddAppleProvider() methods before.

There were two different race conditions between logic in TestTelegramConfirmedRequest
and TelegramAPIMock.GetUpdatesFunc and TelegramAPIMock.SendFunc:
* GetUpdatesFunc may start before token was fetched,
then it produces empty telegramUpdate response, which causes assertions in SendFunc to fail.
* When token becomes used and removed from wait queue after successful login completion,
then GetUpdatesFunc may be still called and new telegram update is created for same token.
This breaks telegram update processing logic,
and SendFunc gets called with the error parameter, which also breaks assertions.