dotnet restore does not consider RestoreAdditionalProjectSources coming from a NuGet package

[DarkDaskin]

Describe the bug

I have some projects which consume packages from a private feed. To avoid specifying RestoreAdditionalProjectSources in every project, I made a NuGet package containing that property in its *.Build.props. Specifying this package in a PackageReference alongside the private ones works in Visual Studio, but not in CLI.

To Reproduce

1. Create an empty project with following contents:
   https://gist.github.com/DarkDaskin/fd9512e1edbbb9fe912d68057d3870e2#file-myproject-csproj
2. Create a NuGet package with the following file in the build directory and specify its location in NuGet source settings:
   https://gist.github.com/DarkDaskin/fd9512e1edbbb9fe912d68057d3870e2#file-unitymodstudio-bepinex-build-props
3. Open MyProject.csproj on Visual Studio and select Restore NuGet Packages in the Solution Explorer. It works.
4. Run dotnet restore in the directory containing MyProject.csproj. It fails.

Exceptions (if any)

error NU1101 regarding BepInEx.* packages. Their private feed is not listed there.

Further technical details

• Include the output of dotnet --info
  https://gist.github.com/DarkDaskin/fd9512e1edbbb9fe912d68057d3870e2#file-dotnet-info
• The IDE (VS / VS Code/ VS4Mac) you're running on, and its version
  Visual Studio 2022 Version 17.14.0

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