### 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_
error = None
        with CaptureOutput() as c:
            try:
                process.run()
            except Exception as e:
                error = e
        result = queue.get()
        end_time = now(millis=True)
        
        request_id = long_uid()
        log_output = 'START %s: Lambda %s started via "local" executor ...' % (
            request_id,
            lambda_function.arn(),
        )
        
        for stream in (c.stdout(), c.stderr()):
            if stream:
                log_output += ("\n" if log_output else "") + stream
        if isinstance(result, InvocationResult) and result.log_output:
            log_output += "\n" + result.log_output
        log_output += "\nEND RequestId: %s" % request_id
        log_output += "\nREPORT RequestId: %s Duration: %s ms" % (
            request_id,
            int((end_time - start_time) * 1000),
        )
        
        store_lambda_logs(lambda_function, log_output)
        result = result.result if isinstance(result, InvocationResult) else result
        if error:
            LOG.info(