Fix System.Web.Services.Description missing NetFx type forwards

[mconnew]

Also improved PackageVerifier to handle more scenarios and have better reporting

Copilot reviewed 3 out of 7 changed files in this pull request and generated no suggestions.

Files not reviewed (4)

• System.ServiceModel.sln: Language not supported
• eng/GenRefAssembly.targets: Language not supported
• src/System.Web.Services.Description/ref/System.Web.Services.Description.Ref.csproj: Language not supported
• src/System.Web.Services.Description/src/System.Web.Services.Description.csproj: Language not supported

Comments skipped due to low confidence (1)

src/System.Private.ServiceModel/tools/PackageChecker/Program.cs:37

• The error message should be 'No assemblies found in a lib/net4?? folder. No type forwards to check.'

Console.Error.WriteLine("No assemblies found in a lib/net4?? folder. No type forwards to check.");