Resolve "Cosign VAT Attestation"

Closes #512 (closed)
Closes #525 (closed)

Tested in staging in this job: https://code-ib-mario.staging.dso.mil/dsop/redhat/tim-test-ubi/-/jobs/28140
using this script: https://code-ib-mario.staging.dso.mil/dsop/redhat/tim-test-ubi/-/blob/16dcd955bf453de6bb6dba080fb8d7110197987c/publish_to_registry.py

Validated that all artifacts are uploaded to Harbor in mario env