[clang] [Clang] Generate the GEP instead of adding AST nodes (PR #73730)

[Aaron Ballman via cfe-commits]

https://github.com/AaronBallman commented:

I added the codegen code owners for opinions, but personally, I prefer the direction this patch is heading over the one in https://github.com/llvm/llvm-project/pull/73465

https://github.com/llvm/llvm-project/pull/73730