Added test case for MDEV-13007 ALTER .. ENGINE on temporary sequence may go wrong

Looks like the bug was fixed some time ago (at least I can't repeat it).
I added the test case just have this case tested properly.

mysql-test/suite/sql_sequence/temporary.result

@@ -17,3 +17,27 @@ drop temporary sequence s1;
 CREATE TEMPORARY SEQUENCE s1 ENGINE=InnoDB;
 INSERT INTO s1 VALUES (1, 1, 1000, 1, 1, 1, 1, 0);
 DROP TEMPORARY SEQUENCE s1;
+#
+# MDEV-13007 ALTER .. ENGINE on temporary sequence may go wrong
+#
+create temporary sequence s1 engine=aria;
+alter table s1 engine myisam;
+select nextval(s1);
+nextval(s1)
+1
+drop temporary sequence s1;
+create temporary sequence s1 engine=innodb;
+alter table s1 engine myisam;
+select nextval(s1);
+nextval(s1)
+1
+drop temporary sequence s1;
+create temporary sequence s1;
+alter table s1 engine innodb;
+select nextval(s1);
+nextval(s1)
+1
+select nextval(s1);
+nextval(s1)
+2
+drop temporary sequence s1;

mysql-test/suite/sql_sequence/temporary.test

@@ -23,3 +23,21 @@ drop temporary sequence s1;
 CREATE TEMPORARY SEQUENCE s1 ENGINE=InnoDB;
 INSERT INTO s1 VALUES (1, 1, 1000, 1, 1, 1, 1, 0);
 DROP TEMPORARY SEQUENCE s1;
+
+--echo #
+--echo # MDEV-13007 ALTER .. ENGINE on temporary sequence may go wrong
+--echo #
+
+create temporary sequence s1 engine=aria;
+alter table s1 engine myisam;
+select nextval(s1);
+drop temporary sequence s1;
+create temporary sequence s1 engine=innodb;
+alter table s1 engine myisam;
+select nextval(s1);
+drop temporary sequence s1;
+create temporary sequence s1;
+alter table s1 engine innodb;
+select nextval(s1);
+select nextval(s1);
+drop temporary sequence s1;