Fix test_det_logdet_slogdet_batched on PowerPC (#25773)
Summary:
Changelog:
- Simplify generation of singular matrices to just constructing a constant matrix instead of a random singular matrix using random_square_matrix_of_rank, which is susceptible to numerical issues
Pull Request resolved: https://github.com/pytorch/pytorch/pull/25773
Test Plan:
- test_det_logdet_slogdet_batched should pass
Fixes https://github.com/pytorch/pytorch/issues/25172
cc: branfosj hartb
Apologies for the delay.
Differential Revision: D17261059
Pulled By: soumith
fbshipit-source-id: 8f991e2cb8c0e9dccad363d4785075213088e58a
