[BUGFIX] CacheHashCalculator does not exclude ADMCMD arguments

ADMCMD arguments are not filtered when calculating the cache-hash
which results in a page not found error. The behavior can be
triggered by creating and opening a preview link in the workspace
module which implicitly sets ADMCMD_previewWS during runtime.

Resolves: #79275
Releases: master, 7.6, 6.2
Change-Id: I339c2787e7de1adf47bb1322c91e0a78c476f790
Reviewed-on: https://review.typo3.org/51265


Reviewed-by: Mathias Brodala <mbrodala@pagemachine.de>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Susanne Moog <susanne.moog@typo3.org>
Tested-by: Susanne Moog <susanne.moog@typo3.org>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>