Support .NET < 4.0 and COM registration for CLRInstrumentationEngine on Windows

Followed the build instructions and successfully generated all build artifacts.
Also ensured that all tests pass, namely 37 of 37, 42/42, 59/59 all pass.

In section Environment Variables, in the first occurrence of COR_PROFILER I see a bracketed UUID which implies that successful DLL registration is necessary, especially for framework versions < 4.

However, when I attempt DLL registration as shown below from an admin prompt, it fails with error 0x80070715, i.e. "The specified resource type cannot be found in the image file."

C:\Windows\SysWOW64\regsvr32.exe /i C:\tmp\CLRInstrumentationEngine\bin\Debug\x64\InstrumentationEngine\x64\MicrosoftInstrumentationEngine_x64.dll

The above DLL is missing typical COM sections like REGISTRY, TYPELIB, String Table.
See the attached image.

Build tool version: vs2019 Professional 16.3.5
Host OS: Windows 10, 1903, build 18362.418

What am I missing here?
See also a forward link to my previous message.

Start with docs/environment_variables.md and the first COR_PROFILER reference, then reproduce the reported regsvr32 command against the generated x64 DLL on Windows. Review the linked earlier issue and the build artifacts to determine the expected registration path for .NET versions below 4. Done means the supported registration behavior is established and the documentation or implementation reflects it.