MDEV-33582 Add more warnings to be able to better diagnose network issues

- Disabled "Semisync ack receiver got hangup" warning
  - One could get this warning from semisync if running
    mtr --mysqld=log-warnings=3 rpl.rpl_semi_sync_shutdown_await_ack
- Fixed result file for engines/funcs/rpl_get_lock.test