Resolve "Update check-cves stage to query VAT DB directly"
Closes #162 (closed)
This MR updates the check-cves stage to gather the approved cves from an image by querying the vat db.
Relevant pipeline runs:
- pipeline-runner -- Multiple parent images: https://repo1.dsop.io/dsop/ironbank-pipelines/pipeline-runner/-/jobs/1146472
- python36 -- One parent image: https://repo1.dsop.io/dsop/ironbank-pipelines/pipeline-runner/-/jobs/1146553
- ubi8.3 -- No parent images: https://repo1.dsop.io/dsop/ironbank-pipelines/pipeline-runner/-/jobs/1146592
- pipeline-test-project/base -- Nothing in VAT: https://repo1.dsop.io/dsop/opensource/pipeline-test-project/base/-/jobs/1146721
- pipeline-test-project/base -- No debug output: https://repo1.dsop.io/dsop/opensource/pipeline-test-project/base/-/jobs/1146783