[llvm] [DirectX] Get resource information via TargetExtType (PR #119772)

[Justin Bogner via llvm-commits]

bogner wrote:

> ⚠️ undef deprecator found issues in your code. ⚠️
> 
>  You can test this locally with the following command:
> The following files introduce new uses of undef:
> 
> * llvm/unittests/Analysis/DXILResourceTest.cpp

These are all resolved in #119775, and really this is just exposing that we were already doing the wrong thing here. I don't think there's anything that needs to be done in this PR.

https://github.com/llvm/llvm-project/pull/119772