### 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_
rs = sqs_client.receive_message(QueueUrl=queue_url, MessageAttributeNames=["All"])
            assert len(rs["Messages"]) > 0
            msg = rs["Messages"][0]["Body"]
            msg = json.loads(msg)
            assert condition == msg["requestContext"]["condition"]
            snapshot.match("destination_message", rs)
        retry(receive_message, retries=120, sleep=3)
    @pytest.mark.skip_snapshot_verify(paths=["$..LogResult"])
    def test_large_payloads(self, caplog, lambda_client, create_lambda_function, snapshot):
        """Testing large payloads sent to lambda functions (~5MB)"""
        snapshot.add_transformer(snapshot.transform.lambda_api())
        
        caplog.set_level(logging.INFO)
        function_name = f"large_payload-{short_uid()}"
        create_lambda_function(
            handler_file=TEST_LAMBDA_PYTHON_ECHO,
            func_name=function_name,
            runtime=LAMBDA_RUNTIME_PYTHON36,
        )
        payload = {"test": "test123456" * 100 * 1000 * 5}  
        payload_bytes = to_bytes(json.dumps(payload))
        result = lambda_client.invoke(FunctionName=function_name, Payload=payload_bytes)
        result = read_streams(result)
        snapshot.match("invocation_response", result)
        assert 200 == result["ResponseMetadata"]["HTTPStatusCode"]
        result_data = result["Payload"]
        result_data = json.loads(to_str(result_data))
        assert payload == result_data
parametrize_python_runtimes = pytest.mark.parametrize(
    "runtime",