Restore change that wasn't meant to happen in this PR

Author: mkArtakMSFT

src/Mvc/Mvc.Testing/src/PublicAPI.Shipped.txt

@@ -41,6 +41,7 @@ virtual Microsoft.AspNetCore.Mvc.Testing.WebApplicationFactory<TEntryPoint>.Conf
 virtual Microsoft.AspNetCore.Mvc.Testing.WebApplicationFactory<TEntryPoint>.ConfigureWebHost(Microsoft.AspNetCore.Hosting.IWebHostBuilder! builder) -> void
 virtual Microsoft.AspNetCore.Mvc.Testing.WebApplicationFactory<TEntryPoint>.CreateHost(Microsoft.Extensions.Hosting.IHostBuilder! builder) -> Microsoft.Extensions.Hosting.IHost!
 virtual Microsoft.AspNetCore.Mvc.Testing.WebApplicationFactory<TEntryPoint>.CreateHostBuilder() -> Microsoft.Extensions.Hosting.IHostBuilder?
+virtual Microsoft.AspNetCore.Mvc.Testing.WebApplicationFactory<TEntryPoint>.CreateServer(Microsoft.AspNetCore.Hosting.IWebHostBuilder! builder) -> Microsoft.AspNetCore.TestHost.TestServer!
 virtual Microsoft.AspNetCore.Mvc.Testing.WebApplicationFactory<TEntryPoint>.CreateWebHostBuilder() -> Microsoft.AspNetCore.Hosting.IWebHostBuilder?
 virtual Microsoft.AspNetCore.Mvc.Testing.WebApplicationFactory<TEntryPoint>.Dispose(bool disposing) -> void
 virtual Microsoft.AspNetCore.Mvc.Testing.WebApplicationFactory<TEntryPoint>.DisposeAsync() -> System.Threading.Tasks.ValueTask