`source_json` is deprecated. Use the attribute "source_policy_documents" instead.

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Describe the Bug

Looks like the module is using a deprecated property. I've seen this a few times now through different modules that use it.

│ Warning: Argument is deprecated
│ 
│   with module.aws_node_termination_handler.module.eks_iam_policy.data.aws_iam_policy_document.this,
│   on .terraform-trmd/modules/aws_node_termination_handler.eks_iam_policy/main.tf line 17, in data "aws_iam_policy_document" "this":
│   17:   source_json = var.iam_source_json_url != null ? data.http.iam_source_json_url[0].body : var.iam_source_json
│ 
│ Use the attribute "source_policy_documents" instead.

Expected Behavior

It still works. This is just a deprecation message.

Steps to Reproduce

I see this mostly through cloudposse/helm-release.

module "aws_node_termination_handler" {
  source  = "cloudposse/helm-release/aws"
  version = "0.4.3"

  name                 = "" # avoids hitting length restrictions on IAM Role names
  chart                = var.chart
  repository           = var.chart_repository
  description          = var.chart_description
  chart_version        = var.chart_version
  kubernetes_namespace = var.kubernetes_namespace
  create_namespace     = var.create_namespace
  wait                 = var.wait
  atomic               = var.atomic
  cleanup_on_fail      = var.cleanup_on_fail
  timeout              = var.timeout

  ...
}

Screenshots

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Environment (please complete the following information):

Any

Additional Context

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cloudposse / terraform-aws-iam-policy

`source_json` is deprecated. Use the attribute "source_policy_documents" instead. #12