### 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.match("get_policy", get_policy_result)
        assert lambda_arn == json.loads(get_policy_result["Policy"])["Statement"][0]["Resource"]
    
    @pytest.mark.skipif(
        not is_old_provider(), reason="test does not make valid assertions against AWS"
    )
    def test_add_lambda_permission(self, lambda_client, iam_client, create_lambda_function):
        function_name = f"lambda_func-{short_uid()}"
        lambda_create_response = create_lambda_function(
            handler_file=TEST_LAMBDA_PYTHON_ECHO,
            func_name=function_name,
            runtime=LAMBDA_RUNTIME_PYTHON36,
        )
        lambda_arn = lambda_create_response["CreateFunctionResponse"]["FunctionArn"]
        
        action = "lambda:InvokeFunction"
        sid = "s3"
        principal = "s3.amazonaws.com"
        resp = lambda_client.add_permission(
            FunctionName=function_name,
            Action=action,
            StatementId=sid,
            Principal=principal,
            SourceArn=aws_stack.s3_bucket_arn("test-bucket"),
        )
        
        policy = lambda_client.get_policy(FunctionName=function_name)["Policy"]
        assert isinstance(policy, str)
        policy = json.loads(to_str(policy))
        assert action == policy["Statement"][0]["Action"]