Update to query for image vulnerabilities

Updates the vulnerability query to only return vulnerability for that layer and not inherited entries.

Successful pipeline run:

• https://repo1.dso.mil/dsop/opensource/pipeline-test-project/java-code-evaluator/-/pipelines/213123

Double checked the number of findings per image using vat frontend and the vat_findings.json file. Number of findings per layer matches VAT frontend

Number of findings returned by galvanize/galvanize/java-code-evaluator: 0
Number of findings returned by opensource/gradle/gradle-jre11: 16
Number of findings returned by redhat/openjdk/openjdk11: 21
Number of findings returned by redhat/ubi/ubi8: 128