Get call for `aws_dynamodb_table_export` is broken

[LalitLab]

Describe the bug

> select * from aws_dynamodb_table_export where arn = 'arn:aws:dynamodb:us-east-1:*********:table/test-delete/export/01660303305033-7b1a9b46'
Error: 7 list calls returned errors:
 rpc error: code = Internal desc = hydrate function getTableExport failed with panic interface conversion: interface {} is nil, not *dynamodb.ExportSummary
	10 list calls returned errors:
 rpc error: code = Internal desc = hydrate function getTableExport failed with panic interface conversion: interface {} is nil, not *dynamodb.ExportSummary (SQLSTATE HV000)

Steampipe version (steampipe -v) Example: v0.3.0

Plugin version (steampipe plugin list) Example: v0.5.0

To reproduce Steps to reproduce the behavior (please include relevant code and/or commands).

Expected behavior A clear and concise description of what you expected to happen.

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