xdr-terraform-modules/base/backups/TODO

On 3/28/2022, support for ami based backups was merged into the AWS 
provider. At a future date, we should revisit this module and use
native terraform to do the AMI backups.

See:
 https://github.com/hashicorp/terraform-provider-aws/issues/16520
 https://github.com/hashicorp/terraform-provider-aws/pull/23880