This removes the osbuild-composer-cloud package, binary, systemd units,
the (unused) test binary, and the (only-run-on-RHEL) test in aws.sh.
Instead, move the cloud API into the main package, using the same
socket as the koji API, osbuild-composer-api.socket. Expose it next to
the koji API on route `/api/composer/v1`.
This is a backwards incompatible change, but only of the -cloud parts,
which have been marked as subject to change.
The cloud API will be moved to `/api/composer/v1` in the future.
Mention this in the `servers` section of the openapi.yml (relative URLs
are allowed) too, even though our generator does not consider it.
Follow the worker API so we standardise on one library. This simplifies
the code quite a bit.
No functional change.
Signed-off-by: Tom Gundersen <teg@jklm.no>
