Send an Sentry Issue with associated GitHub Issues to Slack

### Problem Statement We use GitHub Issues to manage Sentry Issues. We have a rule that when there is a notification from Sentry in Slack, the person in charge of that day's need to associate the issue with GitHub issue if it is not yet. It would be very helpful if your Slack notification includes a link to the GitHub issue in the Slack notification if it is already associated with a GitHub Issue. ### Solution Brainstorm Ex. add Issue link to tags of Sentry Issue. We can already choose a tag to include with notification. ### Product Area Issues