Windows build call to erlang:system_info(system_architecture) returns "win32"

[harrisi]

Describe the bug
The call to erlang:system_info/1 with system_architecture returns just "win32" on Windows.

To Reproduce

erlang:system_info(system_architecture).

Expected behavior
Ideally it would return a triple like x86_64-pc-windows.

Affected versions
At least 27, but I believe any version where Windows builds work will have this problem.

Additional context
I haven't tried building locally on Windows yet to see if it's only a problem with the provided pre-built binary.

[garazdawi]

There is some work ongoing in #8142 that I think may solve this issue. Our build system for Windows is currently geared towards calling the architecture win32, so to change it is a rather big endeavour.

I'll close this as we can track it in #8142.