IOC Log Server: Push to a central MySQL instance

As a developer I would like to avoid instrument's disks filling up. From https://github.com/ISISComputingGroup/IBEX/issues/5789 we decided that we would do this by pushing IOC log data into a [central MySQL instance](https://github.com/ISISComputingGroup/IBEX/issues/5818).

## Acceptance Criteria

* Change the IOC Log Server to push to central server
* Change clients to get from the central server (IOC Log view etc.)
* Ensure the IOC Log Server isn't too verbose if connections are severed

## Notes
* The database structure may require thought, do we have different databases for each instrument? Or put all the data in the same place and filter with the source when viewing from the client? We must make sure that one client doesn't get someone else's log messages