Label GitHub issues created (linked) by Sentry

## Summary

It would be just awesome if sentry could automatically create and assign it's own label to a GitHub issue to mark that the issue is linked to/created from sentry. (Should probably be an option). Similar to how ZenDesk, Bugsnag and other integrations do it.

## Motivation

Labels are a good and efficient way to triage different types and/or sources of issues. Knowing what issue is a bug and/or if this bug was created through Sentry or other issue tracking system really helps to organize the development process.

Plus, there are other tools and automation systems that can use Github labels to generate metrics, charts and other things that make life easier.

## Additional Context

Originally from
[https://github.com/getsentry/sentry-plugins/issues/509]()