Update tests to use stubs

Author: joefarebrother

csharp/ql/test/query-tests/Security Features/CWE-285/MissingAccessControl/WebFormsTests/options

@@ -1 +1,3 @@
-semmle-extractor-options: /r:System.Runtime.Extensions.dll /r:System.Collections.Specialized.dll ${testdir}/../../../../../resources/stubs/System.Web.cs 
+semmle-extractor-options: /nostdlib /noconfig
+semmle-extractor-options: --load-sources-from-project:${testdir}/../../../../../resources/stubs/_frameworks/Microsoft.NETCore.App/Microsoft.NETCore.App.csproj
+semmle-extractor-options: ${testdir}/../../../../../resources/stubs/System.Web.cs