fix analyzer tests

[WeihanLi]

test: fix analyzer test errors

'XUnitVerifier' is obsolete: 'https://github.com/dotnet/roslyn-sdk/blob/main/src/Microsoft.CodeAnalysis.Testing/README.md#obsolete-packages'

This collection of packages previously included a number of packages for testing with specific test frameworks, such as MSTest, NUnit, and xUnit. These packages have been marked obsolete, and users are encouraged to migrate to the generic test packages.

https://github.com/dotnet/roslyn-sdk/blob/main/src/Microsoft.CodeAnalysis.Testing/README.md#obsolete-packages
failed CI: https://github.com/WeihanLi/Xunit.DependencyInjection/actions/runs/9606072333/job/26494939480