[llvm] [APInt] Add `bitwiseParity`, `compressBits`, and `expandBits` operations (PR #200114)

[Simon Pilgrim via llvm-commits]

https://github.com/RKSimon commented:

These implementations seem a lot more straightforward:
https://github.com/RKSimon/llvm-project/blob/main/clang/lib/AST/ByteCode/InterpBuiltin.cpp#L5098-L5126

https://github.com/llvm/llvm-project/pull/200114