[llvm] [PassManager] Add pretty stack frames (PR #96078)

[Florian Hahn via llvm-commits]

fhahn wrote:

I originally tried to improve this in 128745cc2681c284bc6d0150a319673a6d6e8424 which did things a bit more complicated fashion. That approach turned out to be relatively expensive and was reverted and I never had time to get back to it. Would be good to check the compile-time impact just to be sure

https://github.com/llvm/llvm-project/pull/96078