### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

`PORTS_CHECK_DOCKER_IMAGE` is not configurable which prevents ECS tasks from running on air-gapped environment



### Expected Behavior

`PORTS_CHECK_DOCKER_IMAGE` can be configured via configuration option to allow use of any available image 

### How are you starting LocalStack?

With a docker-compose file

### Steps To Reproduce

Run an ECS task in an environment where localstack/localstack is not available.

### Environment

```markdown
- OS: RHEL8
- Docker runtime version: Podman v4.2.0
- LocalStack: 1.3.1
```


### Anything else?

_No response_
def test_reserve_container_port(self, docker_client, monkeypatch):
        if isinstance(docker_client, CmdDockerClient):
            pytest.skip("Running test only for one Docker executor")
        monkeypatch.setattr(docker_utils, "PORTS_CHECK_DOCKER_IMAGE", "alpine")
        
        port = reserve_available_container_port(duration=1)
        assert is_container_port_reserved(port)
        assert container_port_can_be_bound(port)
        assert not is_port_available_for_containers(port)
        
        with pytest.raises(PortNotAvailableException):
            reserve_container_port(port)
        
        time.sleep(1)
        assert not is_container_port_reserved(port)
        assert is_port_available_for_containers(port)
        reserve_container_port(port, duration=1)
        assert is_container_port_reserved(port)
        assert container_port_can_be_bound(port)
    def test_container_port_can_be_bound(self, docker_client, monkeypatch):