Ensure Creation of SLR with star (*) in action and resource is not allowed in AWS IAM Policy

Using wildcards (*) in the action and the resource can allow creation of unintended service-linked roles because it allows iam:CreateServiceLinkedRole permissions on all resources. We recommend that you specify resource ARNs instead.

In AWS Console -

1. Sign in to the AWS console and go to the IAM console.
2. In the Navigation pane, select Policies.
3. In the list of policies, select the policy to edit.
4. Select the Permissions tab, and then choose Edit policy.
5. On the review page, review the changes and click Save.

In Terraform -

1. In the aws_iam_policy, aws_iam_role_policy, aws_iam_group_policy, and aws_iam_user_policy resources, edit the policy field so that the allowed Action list and/or Principal have appropriate values rather than a wildcard.
2. When using CreateServiceLinkedRole, update the Resource (or NotResource) ARN list to use specific IDs with valid regions rather than a wildcard.
   For more information on how to effectively write an IAM policy see the AWS and Terraform documentation.

References:
https://docs.aws.amazon.com/IAM/latest/UserGuide/service_code_examples_iam.html
https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/iam_policy