When using the "classic" (non-BuildKit) builder, ensure that
services are iterated in dependency order for a build so that
it's possible to guarantee the presence of a base image that's
been added as a dependency with `depends_on`. This is a very
common pattern when using base images with Compose.
A fix for BuildKit is blocked currently until we can rely on a
newer version of the engine (see docker/compose#9324)[^1].
[^1]: https://github.com/docker/compose/issues/9232#issuecomment-1060389808
Signed-off-by: Milas Bowman <milas.bowman@docker.com>
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