Don't use "Putting the drive down" message in cleaner

There is a script (/usr/local/sbin/tdms-report-problem) on each tape server that greps the logs, searches for "Putting the drive down" message and opens a SNOW ticket.

When the cleaner runs, the tape drive is likely to be already down. There is no problem to put it down again, but it should not add the phrase "Putting the drive down" to the log. There is a high chance (unless something really unexpected happened), that one of [ DataTransferSession, TapeReadSingleThread, TapeWriteSingleThread, DriveHandler ] has already written this phrase to the log.

We should change it to something like "Will put the drive down".

See operations ticket https://gitlab.cern.ch/cta/operations/-/issues/1058 for the context.