Draft: gnome-build-meta based CI
Now that gnome-build-meta#281 (closed) is resolved we can pick up the work to have bst CI for libraries using the same environment we build flatpak and gnomeos from.
I am planning on moving this on CI templates, like we do for flatpak, but I was hoping to use libdazzle as the test bud till we have everything working. Even though its not much active anymore, it should be a decent repo example.