Before a MR (merge request) can be merged, it needs to pass all the CI tests in Zuul (or tests need to be waived). We implement that by requiring an approval by the Zuul bot account.

This card is about getting the following in place:

• The Zuul bot account exists (related issue: CPE-1222)
• Merge requests need to be approved by the Zuul bot account before they can be merged

All of this to be implemented in staging