Fix genSparseCSRTensor: generate non-trivial values for uint8 dtype. (#70580)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/70580
cc nikitaved pearu cpuhrsch
Test Plan: Imported from OSS
Reviewed By: jbschlosser
Differential Revision: D33413597
Pulled By: cpuhrsch
fbshipit-source-id: 313b08e1bd96ffb8d5c7a0fda9384502325e5d08
