Support recursive search for tfstate in s3 bucket?

[keyolk]

I am testing steampipe against tfstates. I am managing multiple tfstate files in one s3 bucket. After testing, it seems that formats such as "$bucketname/**/*.tfstate" are not supported. In practice, we manage a lot of tfstates, and it would be very helpful if recursive search is possible.

Found some test cases which looks related to this https://github.com/turbot/steampipe-plugin-sdk/blob/develop/plugin/get_source_files_test.go#L165 But it never work as I expected