### 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_
handler_file=TEST_LAMBDA_RUBY,
            handler="lambda_integration.handler",
            runtime=LAMBDA_RUNTIME_RUBY27,
        )
        snapshot.match("create-result", create_result)
        result = lambda_client.invoke(FunctionName=function_name, Payload=b"{}")
        result = read_streams(result)
        snapshot.match("invoke-result", result)
        result_data = result["Payload"]
        assert 200 == result["StatusCode"]
        assert "{}" == to_str(result_data).strip()
class TestGolangRuntimes:
    @pytest.mark.skip_snapshot_verify
    @pytest.mark.skip_offline
    def test_golang_lambda(self, lambda_client, tmp_path, create_lambda_function, snapshot):
        """Test simple golang lambda invocation"""
        snapshot.add_transformer(snapshot.transform.lambda_api())
        
        url = TEST_GOLANG_LAMBDA_URL_TEMPLATE.format(
            version=GO_RUNTIME_VERSION,
            os=get_os(),
            arch=get_arch(),
        )
        handler = tmp_path / "go-handler"
        download_and_extract(url, handler)
        
        func_name = f"test_lambda_{short_uid()}"
        create_result = create_lambda_function(
            func_name=func_name,
            handler_file=handler,