Check Pre environment is fully working ahead of 16.6 release prep

As a follow-on from the issues we experienced in the leadup to 16.1 we decided to introduce a Pre environment check ahead of the monthly release steps. This issue should be completed by someone who is not currently a release manager to reduce pressure in the lead-up to the release.

To make sure we have Pre in a working condition please deploy an auto-deploy package that has recently been deployed to Production, to the Pre environment and make sure all tests pass. If you discover any problems please work with Delivery and Quality team members to resolve them before 2023-11-13 to avoid delaying the release prep.

Edited by Dat Tang