dbase_redo: Fix Valgrind-reported memory leak

Introduced by my (Álvaro's) commit 9e4f914b5e, which was itself
backpatched to pg10, though only pg15 and up contain the problem
because of commit 9c08aea6a3.

This isn't a particularly significant leak, but given the fix is
trivial, we might as well backpatch to all branches where it applies, so
do that.

Author: Nathan Bossart <nathandbossart@gmail.com>
Reported-by: Andres Freund <andres@anarazel.de>
Discussion: https://postgr.es/m/x4odfdlrwvsjawscnqsqjpofvauxslw7b4oyvxgt5owoyf4ysn@heafjusodrz7

src/backend/commands/dbcommands.c

@@ -3375,6 +3375,7 @@ dbase_redo(XLogReaderState *record)
 		parent_path = pstrdup(dbpath);
 		get_parent_directory(parent_path);
 		recovery_create_dbdir(parent_path, true);
+		pfree(parent_path);
 
 		/* Create the database directory with the version file. */
 		CreateDirAndVersionFile(dbpath, xlrec->db_id, xlrec->tablespace_id,