Make forced eager fallback optional in codegen (#75274)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/75274
- default to generating forced fallback for TS backend (where it is used
for tests/debugging, but false otherwise
Test Plan: Imported from OSS
Reviewed By: bdhirsh
Differential Revision: D35411211
Pulled By: wconstab
fbshipit-source-id: ccff2f65aa5d8e1aa670d210ce51805985df55ce
(cherry picked from commit 55b48cc02497686f4e25ed3c6dcf9b6b77d49136)
