Describe the resource

EFS supports File system policies to be configured. These policies are currently not collected by CloudQuery.
https://docs.aws.amazon.com/efs/latest/ug/API_DescribeFileSystemPolicy.html

Blog post:
https://aws.amazon.com/blogs/aws/new-for-amazon-efs-iam-authorization-and-access-points/

Can this be added to the EFS table or as a separate table perhaps?

Use Case

Our use case is to build a full cloud resource inventory and perform security and compliance analyses on top of that.
One of the reason we require the file systems is to ensure that they are not overprivileged or public.

Link to API documentation

https://docs.aws.amazon.com/sdk-for-go/api/service/efs/#EFS.DescribeFileSystemPolicy

Additional Context

No response

Pull request (optional)

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