Deprecate widget flag: GTK_WIDGET_DRAWABLE

Use gtk_widget_is_drawable() instead.

https://bugzilla.gnome.org/show_bug.cgi?id=69872

gtk/gtktooltip.c

@@ -553,7 +553,7 @@ child_location_foreach (GtkWidget *child,
   struct ChildLocation *child_loc = data;
 
   /* Ignore invisible widgets */
-  if (!GTK_WIDGET_DRAWABLE (child))
+  if (!gtk_widget_is_drawable (child))
     return;
 
   x = 0;