Bump Microsoft.NET.Test.Sdk from 17.7.2 to 17.8.0 (open-telemetry#3082)

Bumps [Microsoft.NET.Test.Sdk](https://github.com/microsoft/vstest) from 17.7.2 to 17.8.0.
- [Release notes](https://github.com/microsoft/vstest/releases)
- [Changelog](https://github.com/microsoft/vstest/blob/main/docs/releases.md)
- [Commits](microsoft/vstest@v17.7.2...v17.8.0)

---
updated-dependencies:
- dependency-name: Microsoft.NET.Test.Sdk
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

test/Directory.Packages.props

@@ -25,7 +25,7 @@
     <PackageVersion Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="7.0.0" />
     <PackageVersion Include="Microsoft.Extensions.Hosting" Version="7.0.1" />
     <PackageVersion Include="Microsoft.Extensions.Logging" Version="7.0.0" />
-    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.7.2" />
+    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
     <PackageVersion Include="MongoDB.Driver" Version="2.22.0" />
     <PackageVersion Include="NSubstitute" Version="5.1.0" />
     <PackageVersion Include="MySqlConnector" Version="2.2.7" />