WIP Add various llvm raising passes

[ivanradanov]

TODO need to fix some issues with LLVMToMemref, also upstream patch for affinescope handling

[ivanradanov]

I use this pipeline

enzymexlamlir-opt  --pass-pipeline='builtin.module(convert-llvm-to-cf,convert-llvm-to-arith,canonicalize,enzyme-lift-cf-to-scf,canonicalize,promote-scf-while,canonicalize,convert-llvm-to-arith)'

[wsmoses]

minor, but for ease can we merge this with

Enzyme-JAX/src/enzyme_ad/jax/Passes/LibDeviceFuncsRaisingPass.cpp

Line 426 in b0663d3

// AddUIExtendedOpLowering,

(that doesn't have cmp, but does have addf)