[llvm] [HLSL] Refactoring DXILABI.h to not depend on scope printer (PR #153840)

[via llvm-commits]

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@@ -120,8 +120,7 @@ MDNode *MetadataBuilder::BuildRootConstants(const RootConstants &Constants) {
 MDNode *MetadataBuilder::BuildRootDescriptor(const RootDescriptor &Descriptor) {
   IRBuilder<> Builder(Ctx);
   StringRef ResName =
-      enumToStringRef(dxil::ResourceClass(to_underlying(Descriptor.Type)),
-                      dxil::getResourceClasses());
+      dxil::getResourceClassName(dxil::ResourceClass(Descriptor.Type));
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joaosaffran wrote:

This is not the same type, below is the Error I am seeing with the suggested change.
```
Cannot initialize a parameter of type 'ResourceClass' with an lvalue of type 'const DescriptorType'
```

https://github.com/llvm/llvm-project/pull/153840