[TASK] DatabaseIntegrityView: Don't extend BaseScriptClass

To reduce BaseScriptClass "SOBE" usages, the lowlevel
controller "DatabaseIntegrityView" no longer extends this class
and inlines some of the detail methods into routing
target "mainAction".

Change-Id: I67b0bae5848607166d19988cb005c91301754413
Resolves: #82729
Releases: master
Reviewed-on: https://review.typo3.org/54366


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Frank Naegler <frank.naegler@typo3.org>
Tested-by: Frank Naegler <frank.naegler@typo3.org>