Fix BSR->Dense Batched Bug (#82120)
A todo in the tests which should have been removed and addressed before the initial PR landed was left, and so left holes in testing BSR-> Dense. This addresses the underlying issue and removes the hole in test coverage. #8071 Introduces more comprehensive test coverage for sparse compressed <-> Dense conversion in general.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/82120
Approved by: https://github.com/nikitaved, https://github.com/bhosmer
