MDEV-11477: MariaRocks: rocksdb.type_varchar failure

Update the test results (checked)

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

@@ -721,7 +721,7 @@ create table t (id int primary key, email varchar(100), KEY email_i (email(30)))
 insert into t values (1, 'abcabcabcabcabcabcabcabcabcabcabc  ');
 explain select 'email_i' as index_name, count(*) AS count from t force index(email_i);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t	index	NULL	email_i	33	NULL	#	Using index
+1	SIMPLE	t	ALL	NULL	NULL	NULL	NULL	#	
 select 'email_i' as index_name, count(*) AS count from t force index(email_i);
 index_name	count
 email_i	1
@@ -734,7 +734,7 @@ create table t (id int primary key, email varchar(100), KEY email_i (email(30)))
 insert into t values (1, 'a');
 explain select 'email_i' as index_name, count(*) AS count from t force index(email_i);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t	index	NULL	email_i	33	NULL	#	Using index
+1	SIMPLE	t	ALL	NULL	NULL	NULL	NULL	#	
 select 'email_i' as index_name, count(*) AS count from t force index(email_i);
 index_name	count
 email_i	1