IRONIC_MACHINE_OS_DOWNLOADER_IMAGE unable to gzip -d image

[kononovn]

Describe the bug
IRONIC_MACHINE_OS_DOWNLOADER_IMAGE=registry.svc.ci.openshift.org/ocp/4.4-2019-12-19-033827@sha256:e0ae053ac41a424b4f18702574e42dbb0bac48b13cc0356880272ae9df843354
After image( rhcos-44.81.201912131839.0-openstack.x86_64.qcow2.gz) is downloaded, container tries to open archive however image is not in gzip format. This is usual not compressed qcow2 file. As a result container exits with error "Exited (1)"

Logs:

• gzip -d rhcos-44.81.201912131839.0-openstack.x86_64.qcow2.gz
  gzip: rhcos-44.81.201912131839.0-openstack.x86_64.qcow2.gz: not in gzip format

file /opt/dev-scripts/ironic/tmp/tmp.AZMCKV6OJu/rhcos-44.81.201912131839.0-openstack.x86_64.qcow2.gz
/opt/dev-scripts/ironic/tmp/tmp.AZMCKV6OJu/rhcos-44.81.201912131839.0-openstack.x86_64.qcow2.gz: QEMU QCOW Image (v3), 17179869184 bytes

To Reproduce
Run script:
04_setup_ironic.sh
and this script ends by infinity loop
curl --fail http://localhost/images/rhcos-ootpa-latest.qcow2.md5sum
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
curl: (22) The requested URL returned error: 404 Not Found
sleep 1

Check container logs
podman logs d25add5520c9

• gzip -d rhcos-44.81.201912131839.0-openstack.x86_64.qcow2.gz
  gzip: rhcos-44.81.201912131839.0-openstack.x86_64.qcow2.gz: not in gzip format

Environment: VMs
No customization at all. All env.variables are default except PULL_SECRET

Expected/observed behavior

1. Compress image rhcos-44.81.201912131839.0-openstack.x86_64.qcow2.gz

[hardys]

This was fixed yesterday via #867

The problem is the Content-Encoding header was reintroduced, now fixed via coreos/coreos-assembler#1006 but #867 works around the issue by downloading the images without the --compressed flag