fix: use aws registry mirrors for vuln scan

[rvazarkar]

Description

Use the aws images for the trivy dbs. Suggested workaround from the community

• https://github.com/orgs/community/discussions/139074
• Ratelimiting error when downloading vulnerability db from ghcr.io aquasecurity/trivy-action#389

Motivation and Context

This PR addresses: https://specterops.atlassian.net/browse/BED-4956

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Types of changes

• Bug fix (non-breaking change which fixes an issue)

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