### 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_container_with_cap_add(self, docker_client: ContainerClient, create_container):
        container = create_container(
            "alpine",
            cap_add=["NET_ADMIN"],
            command=[
                "sh",
                "-c",
                "ip link add dummy0 type dummy && ip link delete dummy0 && echo test",
            ],
        )
        stdout, _ = docker_client.start_container(
            container_name_or_id=container.container_id, attach=True
        )
        assert "test" in to_str(stdout)
        container = create_container(
            "alpine",
            command=[
                "sh",
                "-c",
                "ip link add dummy0 type dummy && ip link delete dummy0 && echo test",
            ],
        )
        with pytest.raises(ContainerException):
            stdout, _ = docker_client.start_container(
                container_name_or_id=container.container_id, attach=True
            )
    def test_container_with_cap_drop(self, docker_client: ContainerClient, create_container):