Deprecate accessibility testing
Flagging accessibility testing as deprecated, as per this [Slack discussion](https://gitlab.slack.com/archives/C0SFP840G/p1680049275036929 and related MR.
Flagging accessibility testing as deprecated, as per this [Slack discussion](https://gitlab.slack.com/archives/C0SFP840G/p1680049275036929 and related MR.