Feature: add sending promethes alerts via email

[xuexihuang]

Checklist

• [X] I've searched for similar issues and couldn't find anything matching
• [X] I've discussed this feature request in the OpenIMSDK Slack and got positive feedback

Is this feature request related to a problem?

None

Problem Description

Solution Description

prometheus-config.yaml file is configured with a feature to send alerts via email

Benefits

It's very convenient to configure the alert sending feature of Prometheus

Potential Drawbacks

No response

Additional Information

No response