CE backport of Add Incidents section to Operations settings

Reuben Pereirarequested to merge
psimyn-incident-report-section-ce into master

What does this MR do?

CE backport of https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/9642

What are the relevant issue numbers?

https://gitlab.com/gitlab-org/gitlab-ee/issues/4925

Edited by Simon Knox

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