### 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_
LOG.info(
                    "Skip setting LAMBDA_JAVA_OPTS as JAVA_TOOL_OPTIONS already defined in Lambda env vars"
                )
            else:
                LOG.debug(
                    "Passing JVM options to container environment: JAVA_TOOL_OPTIONS=%s",
                    config.LAMBDA_JAVA_OPTS,
                )
                environment["JAVA_TOOL_OPTIONS"] = config.LAMBDA_JAVA_OPTS
        
        if is_nodejs_runtime(runtime):
            environment["NODE_TLS_REJECT_UNAUTHORIZED"] = "0"
        
        LOG.info("Running lambda: %s", lambda_function.arn())
        result = self.run_lambda_executor(lambda_function=lambda_function, inv_context=inv_context)
        return result
    def provide_file_to_lambda(self, local_file: str, inv_context: InvocationContext) -> str:
        if config.LAMBDA_REMOTE_DOCKER:
            LOG.info("TODO: copy file into container for LAMBDA_REMOTE_DOCKER=1 - %s", local_file)
            return local_file
        mountable_file = Util.get_host_path_for_path_in_docker(local_file)
        _, extension = os.path.splitext(local_file)
        target_file_name = f"{md5(local_file)}{extension}"
        target_path = f"/tmp/{target_file_name}"
        inv_context.docker_flags = inv_context.docker_flags or ""
        inv_context.docker_flags += f"-v {mountable_file}:{target_path}"
        return target_path
class LambdaExecutorReuseContainers(LambdaExecutorContainers):
    """Executor class for executing Lambda functions in re-usable Docker containers"""
    def __init__(self):