Bump Microsoft.AspNetCore.TestHost from 7.0.13 to 8.0.0 in /src

Bumps [Microsoft.AspNetCore.TestHost](https://github.com/dotnet/aspnetcore) from 7.0.13 to 8.0.0.
- [Release notes](https://github.com/dotnet/aspnetcore/releases)
- [Changelog](https://github.com/dotnet/aspnetcore/blob/main/docs/ReleasePlanning.md)
- [Commits](dotnet/aspnetcore@v7.0.13...v8.0.0)

---
updated-dependencies:
- dependency-name: Microsoft.AspNetCore.TestHost
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

src/SqlServer.Native.Tests/SqlServer.Native.Tests.csproj

@@ -10,7 +10,7 @@
     <PackageReference Include="NServiceBus.Transport.SqlServer" Version="7.0.2" />
     <PackageReference Include="MarkdownSnippets.MsBuild" Version="25.1.0" PrivateAssets="all" />
     <PackageReference Include="NServiceBus" Version="8.1.6" />
-    <PackageReference Include="Microsoft.AspNetCore.TestHost" Version="7.0.13" />
+    <PackageReference Include="Microsoft.AspNetCore.TestHost" Version="8.0.0" />
     <PackageReference Include="Verify.SqlServer" Version="8.0.1" />
     <PackageReference Include="Verify.Xunit" Version="22.3.0" />
     <PackageReference Include="Xunit" Version="2.6.1" />