[llvm] Allow the dumping of .dwo files contents to show up when dumping an e… (PR #66726)

[Greg Clayton via llvm-commits]

clayborg wrote:

The main question is, should we get this patch in as is and then add the new options? Or just combine it all here. 

Also from a testing perspective, how can I add a filename + .dwo test that is portable? The DWO name is usually a full path and I am not sure that relative file paths are supported by the llvm stuff? If we are testing this in llvm, then we can't use clang in the tests right? So I would need to either run obj2yaml on the main executable and .dwo file, but then I still end up with problems with the .dwo path being hard coded

https://github.com/llvm/llvm-project/pull/66726