[clang] [CIR] Implement cleanups for temporaries with automatic duration (PR #189754)

[Erich Keane via cfe-commits]

https://github.com/erichkeane commented:

So... i absolutely hate this approach.  I realize this is something classic-lowering does (I think?)... but do we NEED to?  

I'm kinda horrified by this TBH.

https://github.com/llvm/llvm-project/pull/189754