In patch #94429 inclusion of LL file has been removed accidentally.
To prevent multiple inclusion of LL-file in loop, incusion is done
in DataStructureIdentifierHook::__construct now.
Adds new constant for LLFile.

Resolves: #90784
Related: #94429
Releases: master
Change-Id: I4446ed6e05b8e506279e77fae4703a817831129d
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/70465


Tested-by: core-ci <typo3@b13.com>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Björn Jacob <bjoern.jacob@tritum.de>
Tested-by: waldhacker <hello@waldhacker.dev>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Björn Jacob <bjoern.jacob@tritum.de>
Reviewed-by: Rudy Gnodde <rudy@famouswolf.com>
Reviewed-by: waldhacker <hello@waldhacker.dev>