Fix torch.cholesky deprecation warning (#66645)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/66645
Fixes:
```
test_cholesky_solve_batched_broadcasting_cpu_complex128 (__main__.TestLinalgCPU) ... test_linalg.py:3099: UserWarning: torch.cholesky is deprecated in favor of torch.linalg.cholesky and will be removed in a future PyTorch release.
```
Test Plan: Sandcastle
Reviewed By: mruberry
Differential Revision: D31635851
fbshipit-source-id: c377eb88d753fb573b3947f0c6ff5df055cb13d8
