System.Formats.Cbor.Tests.csproj: fails to build when bundled FSharp.Core is not on nuget CI feed.

[tmds]

Some of our internal SDK CI builds produce an FSharp.Core version that is not available on Microsoft CI feeds.

Building runtime repository with such an SDK results in:

/home/tester/runtime/src/libraries/System.Formats.Cbor/tests/System.Formats.Cbor.Tests.csproj : error NU1603: Warning As Error: FsCheck 2.14.3 depends on FSharp.Core (>= 10.0.100-beta.25224.6) but FSharp.Core 10.0.100-beta.25224.6 was not found. FSharp.Core 10.0.100-beta.25224.102 was resolved instead. [/home/tester/runtime/Build.proj]

The issue occurs because the C# project can't find the bundled FSharp.Core package.

Like with #112729, --warnAsError false doesn't stop this warning from failing the build.

cc @ViktorHofer @omajid

[ViktorHofer]

I think this was a point in time issue that got fixed over the weekend: dotnet/source-build#5158. Can you please try again?

Like with #112729, --warnAsError false doesn't stop this warning from failing the build.

Where do you set warnAsError? VMR or individual repo?

[tmds]

I think this was a point in time issue that got fixed over the weekend: dotnet/source-build#5158. Can you please try again?

I'm building 8b80947. Would that have the fix?

I also have a fix in mind and I'm about to suggest it in a PR.

Where do you set warnAsError? VMR or individual repo?

runtime build.sh.

Perhaps warnAsError false isn't applied to the test projects currently?

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[tmds]

Per discussion in #115471: FSharp.Core from the vmr CI build needs to be provided separate from the SDK.