Disable test on windows (#49636)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/49636
test_export_stacks fails with permission errors
Test Plan:
CI
Imported from OSS
Reviewed By: robieta
Differential Revision: D25654680
fbshipit-source-id: 5689289e06eebc0686030f90ed56483a072b6850
