Omit application files when CC reports all files are staged

Based on our testing, it seems fine to update the app bits without providing
a zip file. In this case, the app may restage if its metadata has changed, or it
may just restart.

[Finishes #68290696] #128
Upload correct files during release step

We thought this was rather simple and self-evident, but we completely forgot
to check that we were uploading the correct filesto S3