Is there an existing issue for this?

• I have searched the existing issues

Current Behavior

I run the following command to create a service-linked role:

aws iam create-service-linked-role --aws-service-name ecs.amazonaws.com --endpoint-url=http://localhost:4566

Here is the role that is created.
Two things to notice:

1. "RoleName" is "service-linked-role-xxxxxxxx". The ECS service-linked role name when I call AWS is AWSServiceRoleForECS
2. Because the name is using a uuid concatenated to "service-linked-role", I can keep calling this endpoint and it will always create a new role, whereas in AWS, I would received an error saying role already exists.

{
    "Role": {
        "Path": "/",
        "RoleName": "service-linked-role-6226467e",
        "RoleId": "4trul9gogjlqtlz5r1jk",
        "Arn": "arn:aws:iam::000000000000:role/aws-service-role/ecs.amazonaws.com/service-linked-role-6226467e",
        "CreateDate": "2022-01-10T21:32:00.610000+00:00",
        "AssumeRolePolicyDocument": {
            "Version": "2012-10-17",
            "Statement": [
                {
                    "Effect": "Allow",
                    "Principal": {
                        "Service": "ecs.amazonaws.com"
                    },
                    "Action": "sts:AssumeRole"
                }
            ]
        },
        "MaxSessionDuration": 3600
    }
}

Expected Behavior

1. Service linked roles should match the names that AWS returns (for the case above it should return "AWSServiceRoleForECS")
2. Service linked roles that already exist should return an error

How are you starting LocalStack?

With a docker-compose file

Steps To Reproduce

How are you starting localstack (e.g., bin/localstack command, arguments, or docker-compose.yml)

docker-compose up

Client commands (e.g., AWS SDK code snippet, or sequence of "awslocal" commands)

aws iam create-service-linked-role --aws-service-name ecs.amazonaws.com --endpoint-url=http://localhost:4566

Environment

- OS: Windows 10 and MacOS
- LocalStack: 0.13.3

Anything else?

No response