### Is there an existing issue for this?

- [X] I have searched the existing issues

### Feature description

The use case I have in mind is to run Node 16.x Lambdas - the default container registry is `lambci/lambda` which is effectively abandoned. [Not even Node 14.x has been published](https://github.com/lambci/docker-lambda/pull/330). However, switching the registry over to [`amazon/aws-lambda-nodejs`](https://hub.docker.com/r/amazon/aws-lambda-nodejs) still fails to pull the container, since localstack is looking for the tag `nodejs16.x`. I'd like to be able to specify that if the runtime is `nodejs16.x` it just looks for tag `16`.

### 🧑‍💻 Implementation

_No response_

### Anything else?

_No response_
Payload=b'{"echo":"echo"}',
        )
        result = read_streams(result)
        snapshot.match("invoke-result", result)
        result_data = result["Payload"]
        assert 200 == result["StatusCode"]
        
        assert "LinkedHashMap" in to_str(result_data)
        assert result_data is not None
    @pytest.mark.skip_snapshot_verify(
        paths=["$..invoke-result.LogResult", "$..invoke-result.Payload"]
    )
    def test_java_runtime_with_large_payload(
        self, lambda_client, simple_java_lambda, caplog, snapshot
    ):
        """Tests a invocation against a java lambda with a 5MB payload"""
        snapshot.add_transformer(snapshot.transform.lambda_api())
        
        caplog.set_level(logging.INFO)
        payload = {"test": "test123456" * 100 * 1000 * 5}  
        payload = to_bytes(json.dumps(payload))
        result = lambda_client.invoke(FunctionName=simple_java_lambda, Payload=payload)
        result = read_streams(result)
        snapshot.match("invoke-result", result)
        result_data = result["Payload"]
        assert 200 == result["StatusCode"]
        assert "LinkedHashMap" in result_data
        assert result_data is not None
    @pytest.mark.skip_snapshot_verify
    def test_java_runtime_with_lib(self, lambda_client, create_lambda_function, snapshot):