MDEV-35748 : Attempting to create a CONNECT engine Table results in non-InnoDB sequences in Galera cluster error

Problem was incorrect condition on wsrep_check_sequence
when ENGINE!=InnoDB.

Fix is not use DB_TYPE_XXX because it is not correct
on dynamic storage engines. Instead used storage engine
name is looked from thd->lex->m_sql_cmd->option_storage_engine_name.

For CREATE TABLE allow anyting except ENGINE=SEQUENCE.
For CREATE SEQUENCE only ENGINE=InnoDB is supported.
For ALTER TABLE if original table contains sequence information
only ENGINE=InnoDB is supported.

Signed-off-by: Julius Goryavsky <julius.goryavsky@mariadb.com>

sql/sql_cmd.h

@@ -141,6 +141,7 @@ public:
                                          handlerton **ha,
                                          bool tmp_table);
   bool is_set() { return m_storage_engine_name.str != NULL; }
+  const LEX_CSTRING *name() const { return &m_storage_engine_name; }
 };