Import issues when running dlrm_v3 folder

[nstrimple]

When following the steps in the readme here I am getting several import errors

1. ModuleNotFoundError: No module named 'hammer' referring to the /generative-recommenders/generative_recommenders/ops/pytorch/pt_position.py

2. After subbing that import out to refer to common.py I get an error OSError: /deeplearning/fbgemm/fbgemm_gpu:sparse_ops: cannot open shared object file: No such file or directory referring to the same file looking at these type of imports torch.ops.load_library("//deeplearning/fbgemm/fbgemm_gpu:sparse_ops")

[xing-liu]

Please check the latest commit. The problem should be resolved.