output-packet.h: include tm-threads.h and decode.h

This allows the header to be used without including other headers this
one depends on.

Ticket: #7227

src/output-packet.h

@@ -26,6 +26,9 @@
 #ifndef SURICATA_OUTPUT_PACKET_H
 #define SURICATA_OUTPUT_PACKET_H
 
+#include "tm-threads.h"
+#include "decode.h"
+
 /** packet logger function pointer type */
 typedef int (*PacketLogger)(ThreadVars *, void *thread_data, const Packet *);