Check parent footprint as well for component class.

Also output more descriptive text when checking inherited
rules on parent footprint.

Fixes https://gitlab.com/kicad/code/kicad/-/issues/20281

pcbnew/pcbexpr_functions.cpp

@@ -1263,7 +1263,12 @@ static void hasComponentClassFunc( LIBEVAL::CONTEXT* aCtx, void* self )
     result->SetDeferredEval(
             [item, arg]() -> double
             {
-                FOOTPRINT* footprint = dynamic_cast<FOOTPRINT*>( item );
+                FOOTPRINT* footprint = nullptr;
+
+                if( item->Type() == PCB_FOOTPRINT_T )
+                    footprint = static_cast<FOOTPRINT*>( item );
+                else
+                    footprint = item->GetParentFootprint();
 
                 if( !footprint )
                     return 0.0;