mysql_manager_submit Segfault at Startup Still Possible During Recovery

MDEV-26473 fixed a segmentation fault at startup between the handle manager thread and the binlog background thread, such that the binlog background thread could be started and submit a job to the handle manager, before it had initialized. Where MDEV-26473 made it so the handle manager would initialize before the main thread started the normal binary logs, it did not account for the recovery case.

That is, there is still a possibility of a segmentation fault when a server is recovering using the binary logs such that it can open the binary logs, start the binlog background thread, and submit a job to the handle manager before it is initialized.