[Feature][Alert] Support Telegram Plugin

[pinkhello]

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• I had searched in the issues and found no similar feature requirement.

Description

Hi, All.

We want to add an alert plugin named Telegram for DolphinScheduler. And we would like to contribute to the community.

Use case

No response

Related issues

No response

Are you willing to submit a PR?

• Yes I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct

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