use long index type for index_add_cuda deterministic path (#59254)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/59254
index_add can take int or long index tensor whereas index_put only takes long indices tensor.
In the deterministic path of index_add_cuda, we use index_put. Hence we better convert index tensor to long.
Test Plan:
buck test mode/opt //caffe2/test:torch_cuda -- test_index_add_deterministic
✓ ListingSuccess: caffe2/test:torch_cuda - main (14.748)
✓ Pass: caffe2/test:torch_cuda - test_index_add_deterministic_cuda (test_torch.TestTorchDeviceTypeCUDA) (27.717)
✓ Pass: caffe2/test:torch_cuda - main (27.717)
Reviewed By: ngimel
Differential Revision: D28804038
fbshipit-source-id: de12932a7738f2805f3bceb3ec024497625bce6a
