[clang] [clang] Add `intrin0.h` header to mimic `intrin0.h` used by MSVC STL for clang-cl (PR #75711)

[Simon Pilgrim via cfe-commits]

RKSimon wrote:

@MaxEW707 If you pull out the adcintrin.h change into a separate PR we can fast track it as it should be done anyhow

https://github.com/llvm/llvm-project/pull/75711