PGPRO-6867: include required headers for PostgreSQL 15 in engine.c

- It loooks like we now need to explicitly include storage/fd.h for the
  functions durable_unlink, BasicOpenFile etc.
- We need to include access/xlogrecovery.h for the function GetXLogReplayRecPtr
  which was moved here in the commit 70e81861fadd9112fa2d425c762e163910a4ee52.

Author: Marina Polyakova

engine.c

@@ -29,6 +29,10 @@
 #include "access/htup_details.h"
 #include "access/parallel.h"
 #include "access/xlog.h"
+#if PG_VERSION_NUM >= 150000
+#include "access/xlogrecovery.h"
+#include "storage/fd.h"
+#endif
 #include "catalog/pg_tablespace.h"
 #include "miscadmin.h"
 #include "port/pg_crc32c.h"