[clang] [Clang][X86] Add tests for AVX512 integer comparison intrinsics to be used in constexpr (PR #169452)

[Simon Pilgrim via cfe-commits]

RKSimon wrote:

> @RKSimon I'm unsure why the tests are failing for _mm_cmp*_epu16_mask, am I missing something?

Try after #169891

https://github.com/llvm/llvm-project/pull/169452