[clang] [HLSL] remove double impelementation of log, sin, trunc intrinsics (PR #86440)

[Andrii Levitskiy via cfe-commits]

aabysswalker wrote:

@farzonl Thank for review, i dont have write access, can you merge the PR? btw, i spend long time searching for a tests, but these intrinsics werent really covered, shouldv mentioned that in pr.

https://github.com/llvm/llvm-project/pull/86440