This is not one of the valid stages in the top level "stages:"
declaration, you're supposed to get your stage from your
test-source-dep.yml include. Avoids issues when .baremetal-test gets
included after your test-source-dep.
Acked-by: Daniel Stone <daniels@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17146>