### 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_
self, tmpdir, docker_client: ContainerClient
    ):
        container_name = _random_container_name()
        message = "test_message_stdin"
        try:
            docker_client.create_container(
                "alpine",
                name=container_name,
                interactive=True,
                command=["sh", "-c", "cat > test_file"],
            )
            output, _ = docker_client.start_container(
                container_name, interactive=True, stdin=message.encode(config.DEFAULT_ENCODING)
            )
            target_path = tmpdir.join("test_file")
            docker_client.copy_from_container(container_name, str(target_path), "test_file")
            assert message == target_path.read().strip()
        finally:
            docker_client.remove_container(container_name)
    def test_run_container_with_stdin(self, docker_client: ContainerClient):