Proper support for WiX 5

[Vort]

build-msi.sh script first installs WiX 5:

yggdrasil-go/contrib/msi/build-msi.sh

Line 19 in 340cedb

dotnet tool install --global wix --version 5.0.0

Then executes candle and light:

yggdrasil-go/contrib/msi/build-msi.sh

Lines 200 to 201 in 340cedb

	candle $CANDLEFLAGS -out ${PKGNAME}-${PKGVERSION}-${PKGARCH}.wixobj -arch ${PKGARCH} wix.xml && \
	light $LIGHTFLAGS -ext WixUtilExtension.dll -out ${PKGNAME}-${PKGVERSION}-${PKGARCH}.msi ${PKGNAME}-${PKGVERSION}-${PKGARCH}.wixobj

The problem is WiX 5 have no candle and light!
They were removed in version 4:
https://wixtoolset.org/docs/fourthree/

What happens here I suppose is that GitHub Actions contain WiX 3 and it is used despite WiX 5 being installed.
I think it is better to port script for correct usage of WiX 5 instead.

[neilalexander]

Fancy volunteering a PR?

[Vort]

I have almost no knowledge about GitHub Actions and WiX.
So to make decent PR I need to learn these technologies.
Maybe I will do it, but not now.