feat(cloudformation): add support for Fn::ForEach intrinsic function

Add support for the CloudFormation [Fn::ForEach](https://docs.aws.amazon.com/AWSCloudFormation/latest/TemplateReference/intrinsic-function-reference-foreach.html) intrinsic function to enable iteration over collections in templates.

### Discussed in https://github.com/aquasecurity/trivy/discussions/9351
