Allow consumer to use TelegramBot instance outside

[kshashov]

Allow consumer to use TelegramBot instance outside.

The best option is to register TelegramBot instances in the Spring context but it is enough to just add a new builder methods into TelegramBotGlobalProperties.Builder

[kshashov]

Now it is possible to get the TelegramBot instance in TelegramBotGlobalPropertiesConfiguration:

    @Override
    public void configure(TelegramBotGlobalProperties.Builder builder) {
        builder.processBot(token, bot -> {
            bot.execute(new SendMessage(354681036, "test"));
        });
    }