[clang] [llvm] [HLSL] Implement dot2add intrinsic (PR #131237)

[Sumit Agarwal via llvm-commits]

sumitsays wrote:

> Please run clang format

Ran it and it didn't modify any files.

![image](https://github.com/user-attachments/assets/8ccb4429-2ce6-4dae-8da2-65381cd6efde)


https://github.com/llvm/llvm-project/pull/131237