[clang] [HLSL] cleanup builtin names elementwise usage (PR #101543)

[Farzon Lotfi via cfe-commits]

farzonl wrote:

Current test failures are because of https://github.com/llvm/llvm-project/commit/5e84646982d1e should be fixed by https://github.com/llvm/llvm-project/commit/c5f1395f2f7f92015748069528d46ad89cecc9f1
https://github.com/llvm/llvm-project/pull/101549



https://github.com/llvm/llvm-project/pull/101543