test: can't link `dtypes` on arm64 windows-11 w/ debug build

CI doesn't use debug build mode.
vcpkg doesn't build test.
`/Gy` doesn't help.

```
dtypes.obj : fatal error LNK1322: cannot avoid potential ARM hazard (Cortex-A53 MPCore processor bug #843419) in section 0x35; please consider using compiler option /Gy if it was not used [C:\a\actions\actions\build\test\dtypes.vcxproj]
```

One possible solution: rewrite dtypes.c.

See also #5285.