C#: Also support typeof expressions.

Author: michaelnebel

csharp/ql/src/Security Features/CWE-352/MissingAntiForgeryTokenValidation.ql

@@ -56,6 +56,8 @@ predicate hasGlobalAspNetMvcAntiForgeryFilter(Compilation compilation) {
       addGlobalFilter.getArgument(0).getType() instanceof
         AspNetCore::AutoValidateAntiforgeryTokenAttribute or
       addGlobalFilter.getTarget().(ConstructedGeneric).getTypeArgument(0) instanceof
+        AspNetCore::AutoValidateAntiforgeryTokenAttribute or
+      addGlobalFilter.getArgument(0).(TypeofExpr).getTypeAccess().getTarget() instanceof
         AspNetCore::AutoValidateAntiforgeryTokenAttribute
     ) and
     // The filter is added in an ASP.NET Core registration call, which is provided as a lambda argument