Split QA into a dedicated section

What does this MR do and why?

As is, the QA 'package-and-test' section in Danger appears to be part of the Reviewer Roulette (or the Danger section before). This commit splits the QA into a dedicated section.

Before	After (tested on !112743 (comment 1289124759))

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.