A cleanup for MDEV-29446 Change SHOW CREATE TABLE to display default collation

Recording test results according to MDEV-29446 changes:

storage/rocksdb/mysql-test/rocksdb/r/use_direct_io_for_flush_and_compaction.result

storage/rocksdb/mysql-test/rocksdb/r/use_direct_io_for_flush_and_compaction.result

@@ -7,7 +7,7 @@ t1	CREATE TABLE `t1` (
   `a` int(11) DEFAULT NULL,
   `b` char(8) DEFAULT NULL,
   PRIMARY KEY (`pk`)
-) ENGINE=ROCKSDB DEFAULT CHARSET=latin1
+) ENGINE=ROCKSDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
 INSERT INTO t1 VALUES (1, 1,'a');
 INSERT INTO t1 (a,b) VALUES (2,'b');
 set global rocksdb_force_flush_memtable_now=1;