Telegram: add an option for disabling a link preview

Currently this call will cause including a link preview into a message:

  - service: notify.telegram_chat_sys_important
    data:
      message: >-
        Hello
        [link](https://www.home-assistant.io/integrations/telegram/)

изображение

AFAIK there is an option in Telegram to disable a link preview:

I propose to add this option as a part of “data”.

Implemented: https://github.com/home-assistant/core/pull/75898