C#: Base tests for CWE-099 on stubs.

Author: michaelnebel

csharp/ql/test/query-tests/Security Features/CWE-099/options

@@ -1 +1,3 @@
-semmle-extractor-options: /r:System.Collections.Specialized.dll ${testdir}/../../../resources/stubs/System.Web.cs /r:${testdir}/../../../resources/assemblies/System.Data.dll /r:System.Data.Common.dll
+semmle-extractor-options: /nostdlib /noconfig
+semmle-extractor-options: --load-sources-from-project:${testdir}/../../../resources/stubs/System.Data.SqlClient/4.8.3/System.Data.SqlClient.csproj
+semmle-extractor-options: ${testdir}/../../../resources/stubs/System.Web.cs