Fix JIT test config (#46230)
Summary:
Kill jit_simple test config because it was no different than a regular diff config
Fix pattern matching in test.sh for `jit_legacy` config, as it was expecting `legacy_jit`
Pull Request resolved: https://github.com/pytorch/pytorch/pull/46230
Reviewed By: walterddr
Differential Revision: D24270144
Pulled By: malfet
fbshipit-source-id: 2e00dba288af1f1e904334b952033aa21062927a
