Fix test_compressed_layout_conversions_coverage to check BSC format (#117951)
test_compressed_layout_conversions_coverage verifies torch's conversions between different memory layouts using numpy as a reference. Since numpy doesn't support BSC format it just skipped that. Instead fake it by using a transposed BSR format.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/117951
Approved by: https://github.com/zou3519
