Bump Microsoft.VisualStudio.Extensibility.Testing.Xunit to 0.1.796-beta (#79471)

This brings along some fixes needed for it to work under newer versions
of xunit.runner.visualstudio.

Author: JoeRobich

eng/Directory.Packages.props

@@ -4,7 +4,7 @@
     <RoslynDiagnosticsNugetPackageVersion>3.11.0-beta1.24081.1</RoslynDiagnosticsNugetPackageVersion>
     <MicrosoftCodeAnalysisNetAnalyzersVersion>8.0.0-preview.23468.1</MicrosoftCodeAnalysisNetAnalyzersVersion>
     <MicrosoftCodeAnalysisTestingVersion>1.1.3-beta1.24319.1</MicrosoftCodeAnalysisTestingVersion>
-    <MicrosoftVisualStudioExtensibilityTestingVersion>0.1.785-beta</MicrosoftVisualStudioExtensibilityTestingVersion>
+    <MicrosoftVisualStudioExtensibilityTestingVersion>0.1.796-beta</MicrosoftVisualStudioExtensibilityTestingVersion>
     <_BasicReferenceAssembliesVersion>1.7.9</_BasicReferenceAssembliesVersion>
     <!-- CodeStyleAnalyzerVersion should we updated together with version of dotnet-format in dotnet-tools.json -->
     <CodeStyleAnalyzerVersion>4.8.0-3.final</CodeStyleAnalyzerVersion>