tests: Add coverage for win32 handle types

No idea if this actually works, but perhaps we'll find out.

If you wanted the test to run and pass on windows 7, you'd
presumably not want the NT Handle test to run.
10 jobs for external-win32 in 3 minutes and 38 seconds (queued for 3 seconds)
latest
Status Job ID Name Coverage
  Build
passed #240846
debian aarch64
build-debian-aarch64

00:00:31

passed #240847
macos
build-macos

00:00:04

passed #240842
amd64 debian
build-ubuntu

00:00:26

passed #240843
amd64 debian
build-ubuntu-static

00:00:23

passed #240844
win32
build-win32

00:00:21

passed #240845
win64
build-win64

00:00:21

 
  Test
passed #240848
amd64 debian
test-ubuntu-asan

00:00:25

passed #240849
amd64 debian
test-ubuntu-msan

00:00:22

passed #240851
amd64 debian
test-ubuntu-scan

00:00:51

passed #240850
amd64 debian
test-ubuntu-ubsan

00:00:26