[llvm] [DirectX][DXIL] Align type spec of TableGen DXIL Op and LLVM Intrinsic (PR #86311)

[Chris B via llvm-commits]

https://github.com/llvm-beanz commented:

I'm not going to block this, but I'm still unsure that the documentation is clear and covers all the cases we need. I'll defer to @bogner.

https://github.com/llvm/llvm-project/pull/86311