Investigate checksum diff between original and repacked .pkg files #15219
Description
See #15205 (comment)
The checksums are different between the original and repacked .pkgs. After briefly investigating this, I've found that the Bom file has a different checksum and the Payload tarball is bigger in the repacked .pkg than the original .pkgs.
We should spend time looking into this to determine the cause of the issue.