### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

When attempting to list roles where permission boundaries are attached the response cannot be serialized 

`aws --endpoint-url=http://localhost:4566 iam list-roles --region ap-southeast-2`
```
An error occurred (InternalError) when calling the ListRoles operation (reached max retries: 2): exception while calling iam.ListRoles: Invalid type when serializing AttachedPermissionsBoundary: '<Element 'member' at 0xffff8275ef20>' cannot be parsed to structure.
```

### Expected Behavior

Expect that all roles are listed

### 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 run localstack/localstack

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

* Create an IAM policy
* Create an IAM role which used the policy as a permission boundary
* Attempt to list all roles with `aws --endpoint-url=http://localhost:4566 iam list-roles --region ap-southeast-2`


### Environment

```markdown
- OS: MacOS
- LocalStack: latest
```


### Anything else?

_No response_
]
    @s
    def secretsmanager_api():
        return [
            KeyValueBasedTransformer(
                lambda k, v: (
                    k
                    if (isinstance(k, str) and isinstance(v, list) and re.match(PATTERN_UUID, k))
                    else None
                ),
                "version_uuid",
            ),
            KeyValueBasedTransformer(
                lambda k, v: (
                    v
                    if (
                        isinstance(k, str)
                        and k == "VersionId"
                        and isinstance(v, str)
                        and re.match(PATTERN_UUID, v)
                    )
                    else None
                ),
                "version_uuid",
            ),
            SortingTransformer("VersionStages"),
            SortingTransformer("Versions", lambda e: e.get("CreatedDate")),
        ]
    @s
    def secretsmanager_secret_id_arn(create_secret_res: CreateSecretResponse, index: int):