[llvm] [CAS] Add LLVMCAS library with InMemoryCAS implementation (PR #114096)

[Steven Wu via llvm-commits]

cachemeifyoucan wrote:

Ping!

I am going to pushing to upstreaming CAS implementation again with the hope to land this before next dev meeting. @ilovepi @bogner @adrian-prantl Let me know if you want to take another look while I start working on rebasing and updating all the patches. 

https://github.com/llvm/llvm-project/pull/114096