[!!!][TASK] Remove deprecated file reference functionality

Removed class:

* TYPO3\CMS\Core\Resource\Service\UserFileInlineLabelService

Removed public method:

* TYPO3\CMS\Core\Resource\Filter\FileExtensionFilter
    ->filterInlineChildren

Removed public static method:

* TYPO3\CMS\Core\Utility\ExtensionManagementUtility
    ->getFileFieldTCAConfig

Resolves: #101082
Related: #100963
Related: #98479
Releases: main
Change-Id: I5a7519baa65a8296bd417b46a40b7ffe0d6e26c3
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/79400


Tested-by: Oliver Klee <typo3-coding@oliverklee.de>
Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Nikita Hovratov <nikita.h@live.de>
Tested-by: Nikita Hovratov <nikita.h@live.de>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>