Release "images.txt" does not include explicit Synker images
The image list produced by release CI is not comprehensive and does not include any of the "manually-provided" images from the synker file.
See:
https://umbrella-bigbang-releases.s3-us-gov-west-1.amazonaws.com/umbrella/1.2.0/images.txt
And
https://repo1.dso.mil/platform-one/big-bang/bigbang/-/blob/1.2.0/scripts/package/synker.yaml
The release images file does not include any of the synker images.
There should be a mechanism to grab the images from the synker file and populate them in the images.txt file.