master/gpudirect-tcpxo/nccl-test-latest.yaml references non-existent /scripts/demo-run-nccl-test-tcpxo-via-mpi.sh #518

This is supposed to be an example that allows us to test a cluster.
However, it doesn't actually start, because it references /scripts/demo-run-nccl-test-tcpxo-via-mpi.sh which doesn't exist in the Docker image.
Where are these scripts supposed to come from?