Mark a subgroup-related spec as PostgreSQL-only
Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/34847 to resolve failing master.
Also reorders the variables so they're in logical order and removes the unnecessary let! in favor of let.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/34847 to resolve failing master.
Also reorders the variables so they're in logical order and removes the unnecessary let! in favor of let.