ICorDebugGCReferenceEnum API does not provide details about the Finalizer queue objects

ICorDebugGCReferenceEnum is advertised to return COR_GC_REFERENCE objects from the finalizer queue. The finalizer queue roots objects until the finalizer has run.

Unfortunately, it appears there's a gap in the CLR that is missing the implementation for enumerating finalizers (see https://github.com/dotnet/runtime/issues/39333)

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* ID: 9408f703-8c7b-b494-bb76-116a693fcc46
* Version Independent ID: 968ab354-711c-4145-8f16-d58d5e029b84
* Content: [ICorDebugGCReferenceEnum Interface](https://docs.microsoft.com/en-us/dotnet/framework/unmanaged-api/debugging/icordebuggcreferenceenum-interface)
* Content Source: [docs/framework/unmanaged-api/debugging/icordebuggcreferenceenum-interface.md](https://github.com/dotnet/docs/blob/master/docs/framework/unmanaged-api/debugging/icordebuggcreferenceenum-interface.md)
* Product: **dotnet-framework**
* GitHub Login: @tommcdon
* Microsoft Alias: **tommcdon**