### 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_
assert 200 == result["StatusCode"]
        assert {} == result_data["event"]
        
        logs = result.get("LogResult", "")
        logs = to_str(base64.b64decode(to_str(logs)))
        snapshot.add_transformer(
            snapshot.transform.regex(
                re.compile(r"Duration: \d+(\.\d{2})? ms"), "Duration: <duration> ms"
            )
        )
        snapshot.add_transformer(
            snapshot.transform.regex(re.compile(r"Used: \d+ MB"), "Used: <memory> MB")
        )
        snapshot.match("logs", {"logs": logs})
        assert "START" in logs
        assert "Lambda log message" in logs
        assert "END" in logs
        assert "REPORT" in logs
    @pytest.mark.skip_snapshot_verify(
        paths=["$..LogResult", "$..Payload.context.memory_limit_in_mb"]
    )
    def test_invocation_type_request_response(self, lambda_client, python_function_name, snapshot):
        """Test invocation with InvocationType RequestResponse explicitely set"""
        snapshot.add_transformer(snapshot.transform.lambda_api())
        result = lambda_client.invoke(
            FunctionName=python_function_name,
            Payload=b"{}",
            InvocationType="RequestResponse",
        )