Dhruv Kapu

@TobyRoseman I'm also using a model that needs `torch.linalg.lstsq`, so I think it could be worthwhile to implement since it seems like Tensorflow has similar operations too. I would be...

@TobyRoseman I understand that this can't be done using the MIL ops currently available, so I was thinking I would create custom MIL ops to support this as outlined [here](https://apple.github.io/coremltools/docs-guides/source/custom-operators.html)....