use dotnet build instead of vsbuild

[neilboyd]

This PR puts the build back to use dotnet build instead of vsbuild.
It demonstrates the error that is caused by dotnet/msbuild#7331
This PR can be merged once the above mentioned issue is fixed and included in windows-latest build agent.

Fixes #1180, although not in the way suggested.

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[SimonCropp]

this wont work because of this #1160. closing for now