Feature request: support Telegram webhook for notifications

[mujahidfa]

First check

• I added a descriptive title to this issue.
• I used the GitHub search to find a similar request and didn't find it.
• I searched the Prefect documentation for this feature.

Prefect Version

2.x

Describe the current behavior

Currently, Prefect does not support sending notifications via a Telegram message to a Telegram channel.

Describe the proposed behavior

The ability to send notifications via a Telegram message to a Telegram channel i.e., to use Telegram webhook for Notifications.

Example Use

No response

Additional context

No response

[desertaxle]

Hey @mujahidfa, an integration with Telegram would be great! We use Apprise for a lot of our notification functionality, and it looks like Apprise also supports Telegram. For anyone interested in contributing an integration for Telegram, this PR can serve as a template for implementing a new notification block.

[thedevhaider]

Hey @madkinsz, This integration with Telegram looks interesting. I would like to work on this issue. To get started, the reference provided by @desertaxle looks promising. Thanks, @desertaxle for sharing.

[rkscodes]

@thedevhaider are you working on it ? If not then no worries I will start contributing to this issue.

[mujahidfa]

Implemented in #9825. @desertaxle @madkinsz and maintainers, appreciate your PR review, thanks!

[baltic-tea]

I'd like to understand why this feature hasn't been merged yet?

Discuss: Telegram webhook notification support?