GeezerVison

PR Summary

In #8356 test\xUnit\xUnit.tests.csproj was moved to test\xUnit\xUnit.tests.csproj but PowerShell.sln was not updated. This is causing issues in Omnisharp in VS Code with loading the project. This PR updates the solution file to correct the new path and project name.

PR Context

Pain point while developing 😄

PR Checklist

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