MDEV-9621 INSERT DELAYED fails on insert for tables with many columns

This fix also fixes a connection hang when trying to do INSERT DELAYED to a crashed table.

Added crash_mysqld.inc to allow easy crash+restart of mysqld

sql/sql_parse.cc

@@ -4925,6 +4925,7 @@ end_with_restore_list:
   }
   case SQLCOM_SHUTDOWN:
 #ifndef EMBEDDED_LIBRARY
+    DBUG_EXECUTE_IF("crash_shutdown", DBUG_SUICIDE(););
     if (check_global_access(thd,SHUTDOWN_ACL))
       goto error;
     kill_mysql();