The offline mirror index test compares databases with diff and the
nightly test reads JSON with jq. Neither is in the Arch base image, so
both tests failed in CI while passing on a workstation.
./test/all runs the cidata and orchestrator tests under test/unit/ in a couple of seconds, with no ISO. It runs in an Arch container, where the code it covers runs: the container boots systemd for the tests that ask localectl for its keymaps, and the tests run as an ordinary user. The install test keeps covering everything that needs a VM.