Allow QE maintainers to approve qa-common changes

What does this MR do and why?

Allows Quality maintainers to approve changes to .gitlab/ci/qa-common/*, because they're a refactor of the CI files we were already codeowner of.

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.