Enable torch.cholesky for batches > 262140 (#24438)
Summary:
Changelog:
- Iterate over mini batches of 262140 matrices (maximum)
Pull Request resolved: https://github.com/pytorch/pytorch/pull/24438
Test Plan:
- Added slow tests to test the behavior in test_torch and test_cuda
Fixes https://github.com/pytorch/pytorch/issues/24403
Differential Revision: D17175603
Pulled By: soumith
fbshipit-source-id: 1abb0a1e92494cf43ef4ba9efb54a919cd18bfef
