[HLSL][clang] Add elementwise builtins for trig intrinsics (#95999)
This change is part of this proposal:
https://discourse.llvm.org/t/rfc-all-the-math-intrinsics/78294
This is part 3 of 4 PRs. It sets the ground work for using the
intrinsics in HLSL.
Add HLSL frontend apis for `acos`, `asin`, `atan`, `cosh`, `sinh`, and
`tanh`
https://github.com/llvm/llvm-project/issues/70079
https://github.com/llvm/llvm-project/issues/70080
https://github.com/llvm/llvm-project/issues/70081
https://github.com/llvm/llvm-project/issues/70083
https://github.com/llvm/llvm-project/issues/70084
https://github.com/llvm/llvm-project/issues/95966