[TASK] Hide new db settings in Configuration module

Just like the old db settings the new settings for doctrine should
not be displayed in the Configuration module. Old settings are also
blinded as they can still exist in AdditionalConfiguration.php

Only existing settings are overwritten, previously the blinded options
were added to the settings if they didn't exist.

Resolves: #76020
Releases: master
Change-Id: I2a24b8c0841472a8415bd455c99b5ab8dd4f49f4
Reviewed-on: https://review.typo3.org/47995


Reviewed-by: Andreas Fernandez <typo3@scripting-base.de>
Tested-by: Andreas Fernandez <typo3@scripting-base.de>
Reviewed-by: Oliver Hader <oliver.hader@typo3.org>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Oliver Hader <oliver.hader@typo3.org>