### 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_
snapshot.add_transformer(snapshot.transform.lambda_api())
        function_name = f"lambda_func-{short_uid()}"
        create_lambda_function(
            handler_file=TEST_LAMBDA_PYTHON_ECHO,
            func_name=function_name,
            runtime=LAMBDA_RUNTIME_PYTHON36,
            role=lambda_su_role,
        )
        queue_arn = sqs_queue_arn(sqs_queue)
        destination_config = {
            "OnSuccess": {"Destination": queue_arn},
            "OnFailure": {"Destination": queue_arn},
        }
        
        response = lambda_client.put_function_event_invoke_config(
            FunctionName=function_name,
            MaximumRetryAttempts=2,
            MaximumEventAgeInSeconds=123,
            DestinationConfig=destination_config,
        )
        snapshot.match("put_function_event_invoke_config", response)
        
        response = lambda_client.put_function_event_invoke_config(
            FunctionName=function_name,
            MaximumRetryAttempts=2,
            DestinationConfig=destination_config,
        )
        snapshot.match("put_function_event_invoke_config_overwritemaxeventage", response)
        
        response = lambda_client.update_function_event_invoke_config(