Don't include access/htup_details.h in executor/tuptable.h

This is not at all needed; I suspect it was a simple mistake in commit
5408e233f0.  It causes htup_details.h to bleed into a huge number of
places via execnodes.h.  Remove it and fix fallout.

Discussion: https://postgr.es/m/202510021240.ptc2zl5cvwen@alvherre.pgsql

src/backend/utils/adt/xid8funcs.c

@@ -39,6 +39,7 @@
 #include "utils/memutils.h"
 #include "utils/snapmgr.h"
 #include "utils/xid8.h"
+#include "varatt.h"
 
 
 /*