[clang] [llvm] Enable WPD without lto (PR #141777)

[Hassnaa Hamdi via llvm-commits]

hassnaaHamdi wrote:

Hi @teresajohnson 
what do you think? 
For the case of PGO, I think we may disable it. I think The speculative devirtualization is useful for cases where we don't have enough information.

https://github.com/llvm/llvm-project/pull/141777