[llvm] [llvm][lit] Add option to run only the failed tests (PR #158043)

[James Henderson via llvm-commits]

https://github.com/jh7370 commented:

Basically looks good. Couple more minor points and then we're good.

On the note of `%t`, it should work in a read-only context, since regular tests generally write objects there without issue.

https://github.com/llvm/llvm-project/pull/158043