[llvm] [TSan] Fix missing inst cleanup (PR #144067)

[Nikita Popov via llvm-commits]

nikic wrote:

Can you please rebase over https://github.com/llvm/llvm-project/commit/4f8187c0dc6e7a818ebf3272a0c022203f901e96 and regenerate the test, so we can see the difference?

https://github.com/llvm/llvm-project/pull/144067