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

[Max Winkler via cfe-commits]

MaxEW707 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

Done :). Here is the link since I can't add reviewers https://github.com/llvm/llvm-project/pull/75992.


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