Backend: Create error tracking widget
We will need to create an new error tracking widget for the work item of type issue. 1. The widget should have data related to sentry_issue model. 2. It should expose the data that we currently send to the frontend from here: https://gitlab.com/gitlab-org/gitlab/-/blob/master/app/views/projects/issues/_sentry_stack_trace.html.haml#L1 through graphQL
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