[test] split tracer related tests out of test_jit (#40142)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/40142
test_jit is becoming huge again, which makes editor hard to load and
write new tests, this split out the tracer related tests.
Test Plan: Imported from OSS
Reviewed By: ailzhang
Differential Revision: D22085035
Pulled By: wanchaol
fbshipit-source-id: 696bee84985ecfbfeac8e2ee5c27f1bdda8de394
