fix(report): use AWS_REGION env for secrets in asff template

[DmitriyLewen]

Description

Use AWS_REGION env (https://aquasecurity.github.io/trivy/v0.48/tutorials/integrations/aws-security-hub/) for secrets in asff template.

Related issues

• Close bug(template): incorrect productArn field for secrets in asff template #6010

Checklist

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• I've added tests that prove my fix is effective or that my feature works.
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