[llvm] [DirectX] adding support to read/write descriptor table data using obj2yaml/yaml2obj (PR #138315)

[Justin Bogner via llvm-commits]

================
@@ -51,6 +62,11 @@ struct RootParametersContainer {
     Descriptors.push_back(Descriptor);
   }
 
+  void addParameter(dxbc::RootParameterHeader H, DescriptorTable D) {
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bogner wrote:

```suggestion
  void addParameter(dxbc::RootParameterHeader Header, DescriptorTable Table) {
```

https://github.com/llvm/llvm-project/pull/138315