[llvm] [llvm-exegesis][NFC] Refactor all `ValidationEvent` info in a single … (PR #82256)

[Aiden Grossman via llvm-commits]

https://github.com/boomanaiden154 commented:

Thanks for putting this together. This is definitely improves in a couple ways compared to my patch.

https://github.com/llvm/llvm-project/pull/82256