### 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 executing Lambda "%s": %s %s',
                lambda_function.arn(),
                error,
                "".join(traceback.format_tb(error.__traceback__)),
            )
            result = json.dumps(
                {
                    "errorType": error.__class__.__name__,
                    "errorMessage": error.args[0],
                    "stackTrace": traceback.format_tb(error.__traceback__),
                }
            )
            raise InvocationException(result, log_output=log_output, result=result)
        
        invocation_result = InvocationResult(result, log_output=log_output)
        
        invocation_result = self.process_result_via_plugins(inv_context, invocation_result)
        return invocation_result
    def provide_file_to_lambda(self, local_file: str, inv_context: InvocationContext) -> str:
        
        return local_file
    def execute_java_lambda(
        self, event, context, main_file, lambda_function: LambdaFunction = None
    ) -> InvocationResult:
        lambda_function.envvars = lambda_function.envvars or {}
        java_opts = config.LAMBDA_JAVA_OPTS or ""
        handler = lambda_function.handler
        lambda_function.envvars[LAMBDA_HANDLER_ENV_VAR_NAME] = handler
        event_file = EVENT_FILE_PATTERN.replace("*", short_uid())
        save_file(event_file, json.dumps(json_safe(event)))