Remove executable permissions on images to make docs lint happy
https://staging.gitlab.com/gitlab-org/gitlab-ce/issues/42024
Solves build failures in master (e.g. https://gitlab.com/gitlab-org/gitlab-ee/-/jobs/35431404).
Edited by Victor Wu
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
https://staging.gitlab.com/gitlab-org/gitlab-ce/issues/42024
Solves build failures in master (e.g. https://gitlab.com/gitlab-org/gitlab-ee/-/jobs/35431404).