### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

The KMS provider `local-kms` don't start on Apple M1 ( arm64 ).

### Expected Behavior

Localstack should use `darwin-arm64` build of `local-kms`.

### 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 -e KMS_PROVIDER=local-kms localstack/localstack

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

    awslocal kms list-aliases


### Environment

```markdown
- OS: OSX 12.0.1 ( Apple M1 Pro )
- LocalStack: 0.13.2
```


### Anything else?

Pull request in preparation
port = port or config.PORT_KMS
    backend_port = get_free_tcp_port()
    kms_binary = INSTALL_PATH_KMS_BINARY_PATTERN.replace("<arch>", get_os())
    log_startup_message("KMS")
    start_proxy_for_service("kms", port, backend_port, update_listener)
    env_vars = {
        "PORT": str(backend_port),
        "KMS_REGION": config.DEFAULT_REGION,
        "REGION": config.DEFAULT_REGION,
        "KMS_ACCOUNT_ID": TEST_AWS_ACCOUNT_ID,
        "ACCOUNT_ID": TEST_AWS_ACCOUNT_ID,
    }
    if config.dirs.data:
        env_vars["KMS_DATA_PATH"] = config.dirs.data
    result = do_run(kms_binary, asynchronous, env_vars=env_vars)
    wait_for_port_open(backend_port)
    return result
def start_kms_moto(port=None, backend_port=None, asynchronous=None, update_listener=None):