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Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
backport https://gitlab.com/gitlab-org/gitlab/commit/2be136b6cdf59f4664d9fbbe91e16498a47ba227 see https://gitlab.com/gitlab-org/gitlab/commit/3baeb0c7fd6829b8c083a43370163d16f7700263 see https://gitlab.com/gitlab-org/gitlab/merge_requests/21161