fix: integration test statefile prefixing and trivy removal

[cvangerpen]

Related issue(s)

• N/A

Proposed Changes

• Update integration testing state file prefixing to just use the stable branch slug
• Remove trivy as a dependency (was hash-pinned) - will use other tools in-repo instead

Testing

This change was validated by the following observations:

• N/A - pipeline confirms functionality

Checklist

General

• I have deployed and validated this change
• Changelog
  • I have added my changes to CHANGELOG.md
  • No changelog entry is necessary

If releasing a new version

• In CHANGELOG.md, I have moved unreleased items to a newly created release section

If a new input variable was added

• I have added a new variable in variables.tf with a description and default value