### 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_
assert 200 == result["StatusCode"]
        assert json.loads("{}") == result_data["event"]
    @parametrize_python_runtimes
    def test_lambda_send_message_to_sqs(
        self,
        lambda_client,
        create_lambda_function,
        sqs_client,
        sqs_create_queue,
        runtime,
        lambda_su_role,
    ):
        """Send sqs message to sqs queue inside python lambda"""
        function_name = f"test-function-{short_uid()}"
        queue_name = f"lambda-queue-{short_uid()}"
        queue_url = sqs_create_queue(QueueName=queue_name)
        create_lambda_function(
            handler_file=TEST_LAMBDA_SEND_MESSAGE_FILE,
            func_name=function_name,
            runtime=runtime,
            role=lambda_su_role,
        )
        event = {
            "message": f"message-from-test-lambda-{short_uid()}",
            "queue_name": queue_name,
            "region_name": sqs_client.meta.region_name,
        }
        lambda_client.invoke(FunctionName=function_name, Payload=json.dumps(event))
        
        def receive_message():