[TASK] Small cleanup in Typo3DatabaseBackend

Long lines for database queries are not too long anymore.

Change-Id: I2bfbeb9e5e375c43483af9b3d33264a23a4c6adc
Resolves: #46804
Releases: 6.1
Reviewed-on: https://review.typo3.org/19446
Reviewed-by: Philipp Gampe
Tested-by: Philipp Gampe
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn