[TASK] Improve Filelist sorting

Speed up the sorting of files and folders significantly
by simply using uksort instead of usort to save many
unnecessary array_search()-calls.

In addition, the php-intl collator is now
used to sort files based on the backend users'
locale.

Resolves: #100231
Releases: main
Change-Id: Iba5718ce901de5f0e552dcb6ace2bf2354191823
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/78187


Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Nikita Hovratov <nikita.h@live.de>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Nikita Hovratov <nikita.h@live.de>