为什么terraform不缩小这个策略JSON'

我试图在IAM角色中使用AWSBackupServiceRolePolicyForBackup策略:

data "aws_iam_policy" "aws_backup_service_policy" {
  arn = "arn:aws:iam::aws:policy/service-role/AWSBackupServiceRolePolicyForBackup"
}

resource "aws_iam_role_policy" "backup_service_aws_backup_role_policy" {
  policy = data.aws_iam_policy.aws_backup_service_policy.policy
  role   = aws_iam_role.backup_service_role.name
}

结果是:

错误:正在放置IAM角色策略terraform—20240401140929162200000001:LimitExceeded:超过角色foundry—terraform—backup—service—role—dev的最大策略大小10240字节

This makes sense, as the json for the role is actually over the maximum policy size. However, I've tried minifying the JSON with:

```hcl
resource "aws_iam_role_policy" "backup_service_aws_backup_role_policy" {
  policy = jsonencode(jsondecode(data.aws_iam_policy.aws_backup_service_policy.policy))
  role   = aws_iam_role.backup_service_role.name
}

如所述here:

从Terraform 0.12开始，您可以使用jsondecode和jsonencode的往返生成小型JSON，因为jsonencode总是生成最小的JSON.

如果我创建一个输出，我可以验证value确实被缩小了:

output "policy_json" {
  value = jsonencode(jsondecode(data.aws_iam_policy.aws_backup_service_policy.policy))
  description = "the policy json"

但当我try apply配置时，我最终会遇到同样的错误.为什么政策在申请时没有缩小？