Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
cf. https://gitlab.com/gitlab-org/gitlab/-/merge_requests/38475 https://gitlab.com/gitlab-org/gitlab/-/issues/213749 https://gitlab.com/gitlab-org/gitlab/-/issues/213174 Signed-off-by: Takuya Noguchi <takninnovationresearch@gmail.com>