Add ceph-release-containers job

Add ceph-release-containers job

Builds prerelease versions of ceph container images: two arch-specific
images and one 'manifest-list' image.  Pushed all to quay.ceph.io/ceph,
in a private set of repos (prerelease-amd64, prerelease-arm64, and
prerelease) for testing and signoff.  Once moved, the script
container/make-manifest-list.py can be used with the --promote flag to
promote them from quay.ceph.io to quay.io for public release.

Signed-off-by: Dan Mick <dan.mick@redhat.com>