MDEV-29672 test fixup for --ps-protocol

mysql-test/main/myisam_debug_keys.test

@@ -10,6 +10,7 @@ CREATE TABLE types (
   type TEXT NOT NULL,
   prefix_length INT NOT NULL
 );
+--disable_ps_protocol
 INSERT INTO types (type, prefix_length) VALUES
 ('INT',               0),
 ('BIGINT',            0),
@@ -29,6 +30,7 @@ INSERT INTO types (type, prefix_length) VALUES
 ('TEXT',              12),
 ('TEXT',              16),
 ('TEXT',              100);
+--enable_ps_protocol
 DELIMITER $$;
 BEGIN NOT ATOMIC
   DECLARE create2_template TEXT