reland "add a reinplacing FX pass (#80897)" (#82407)
fixes #81457
fixes #81216
fixes #81212
fixes #81207
fixes #81206
fixes #81218
fixes #81203
fixes #81202
fixes #81214
fixes #81220
fixes #81205
fixes #81200
fixes #81204
fixes #81221
fixes #81209
fixes #81210
fixes #81215
fixes #81217
fixes #81222
fixes #81211
fixes #81201
fixes #81208
As part of this PR I'm also re-enabling all of the functionalization tests that got marked as flaky in CI (they're not actually flaky - I think they got marked because a PR that should have changed their expect-test output made it to master without the changes. I'll let CI run on this PR to confirm though).
reland of https://github.com/pytorch/pytorch/pull/80897
Pull Request resolved: https://github.com/pytorch/pytorch/pull/82407
Approved by: https://github.com/ezyang
