chore: import SpannerLib in ado as submodule

[olavloite]

No description provided.

[gemini-code-assist]

Summary of Changes

Hello @olavloite, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request refactors the dependency management for the spannerlib-dotnet-grpc-server within the SpannerLib .NET wrapper. It transitions from using a pre-built NuGet package to a direct project reference, facilitating a more integrated submodule approach. Concurrently, it standardizes the output directory for native runtime binaries, ensuring consistency across the build process and project configurations.

Highlights

• Dependency Management: The spannerlib-dotnet-grpc-server component is now consumed as a direct project reference instead of a NuGet package, aligning with the integration of SpannerLib as a submodule.
• Build Output Structure: Native runtime binaries for the GRPC server are now organized under a new runtimes/{platform}/native directory structure, replacing the previous binaries directory.
• Build Script Updates: Build scripts (build-grpc-server.sh, build.sh) and project files (.csproj) have been updated to reflect the new runtime directory structure and dependency changes.

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[gemini-code-assist]

Code Review

This pull request refactors the build process for the .NET wrapper of SpannerLib. It changes the dependency on spannerlib-dotnet-grpc-server from a PackageReference to a ProjectReference, which means it's now built from source within the solution. The changes include updating build scripts, project files, and .gitignore to use a new runtimes directory for native binaries instead of binaries.

The changes are consistent and look correct. I've added one suggestion to improve the maintainability of a .csproj file by reducing duplication. Overall, this is a good improvement to the build process.

[gemini-code-assist]

To improve maintainability and reduce repetition, you can define the list of runtimes as a separate item group and then use it to generate the <None> items. This makes it easier to add or remove runtimes in the future.

  <ItemGroup>
    <Runtimes Include="any" />
    <Runtimes Include="linux-x64" />
    <Runtimes Include="linux-arm64" />
    <Runtimes Include="osx-arm64" />
    <Runtimes Include="win-x64" />
    <None Include="runtimes/%(Runtimes.Identity)/native/*" Pack="true" PackagePath="runtimes/%(Runtimes.Identity)/native/" CopyToOutputDirectory="PreserveNewest" />
  </ItemGroup>