Add missing Debian and Ubuntu build variants

As of SERVER-62299, the server has added build variants for the distro debian11. And coming in SERVER-62300 and SERVER-62301, there will be build variants for the distro ubuntu22. The mongo-cxx-driver project requires a build variants for debian11 and ubuntu22. Additionally, build variants are needed for ubuntu20, as these were never added to the mongo-cxx-driver project.