[!!!][TASK] Remove deprecations in DataHandler class

Removed deprecated methods `rmComma, destPathFromUploadFolder,
noRecordsFromUnallowedTables` and property `$checkWorkspaceCache`.

In addition changes visibility for internal properties:
`$recUpdateAccessCache, $recInsertAccessCache, $isRecordInWebMount_Cache,
$isInWebMount_Cache, $cachedTSconfig, $pageCache`.

Resolves: #80709
Releases: master
Change-Id: I9432c9586ff3478128b5e349d43ec18d9ed5a3c6
Reviewed-on: https://review.typo3.org/52503


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Thomas Hohn <thomas@hohn.dk>
Tested-by: Thomas Hohn <thomas@hohn.dk>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>