Move Gitaly page to infra/gitaly and edit text
Per https://gitlab.com/gitlab-com/www-gitlab-com/merge_requests/5373/diffs which had become too unwieldy.
I will merge this now, but feel free to make further subsequent edits.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Per https://gitlab.com/gitlab-com/www-gitlab-com/merge_requests/5373/diffs which had become too unwieldy.
I will merge this now, but feel free to make further subsequent edits.