Try to upload artifacts immediately

Rather than saving images and bundles as CI/CD artifacts only to redownload them for the final upload to the publishing location, try to upload them directly without capturing them as artifacts.

This should lead to some advantages:

• the pipeline is overall faster since it does not have to retrieve large artifacts in the upload job, which leads to cost savings
• bandwidth usage is reduced as there's no useless trasfer of data, avoiding potential egress costs