[llvm] [HLSL] Add support to lookup a ResourceBindingInfo from its use (PR #126556)

[via llvm-commits]

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@@ -770,6 +770,50 @@ void DXILBindingMap::print(raw_ostream &OS, DXILResourceTypeMap &DRTM,
   }
 }
 
+SmallVector<dxil::ResourceBindingInfo>
+DXILBindingMap::findByUse(const Value *Key) const {
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joaosaffran wrote:

`findByUse` makes me think this is used to find all values using the `Key` value. But this seems to be looking only for calls instructions, using such value. Shouldn't we call it `findByFunctionUse` or something more explicitly? 

https://github.com/llvm/llvm-project/pull/126556