move-only: Add txorphanage module

This module captures orphan tracking code for tx relay.

Can be reviewed with --color-moved=dimmed-zebra

src/test/fuzz/process_messages.cpp

@@ -13,6 +13,7 @@
 #include <test/util/net.h>
 #include <test/util/setup_common.h>
 #include <test/util/validation.h>
+#include <txorphanage.h>
 #include <util/memory.h>
 #include <validation.h>
 #include <validationinterface.h>