Enable foldbn tests (#29220)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/29220
Support for accessing constant is added in previous
PRs, this PR re-enables the foldbn tests
Test Plan:
test_jit.py
Imported from OSS
Differential Revision: D18846848
fbshipit-source-id: 90ceaf42539ffee80b984e0d8b2420da66c263c3
