Revert "[fake_impls] Fix seed/offset device for attention kernels (#120839)" (#121447)
This reverts commit df3c8b8390bc601072b0ee9b2c39e07adf370fe2.
It regressed cudagraphs+PT2 performance on SDPA.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/121447
Approved by: https://github.com/Chillee
