[clang] [libc] [llvm] [libc] Implement (v|f)printf on the GPU (PR #96369)

[Jon Chesterfield via cfe-commits]

JonChesterfield wrote:

I've passed some types to nvcc on godbolt and tried to decode the results. It looks like it's passing everything with natural alignment, flattened, with total disregard to the minimum slot size premise clang uses.

https://github.com/llvm/llvm-project/pull/96369