[BUGFIX] Allow import module to also access distributions

This patch streamlines the import module with the import command.
While the CLI commands can import data from extensions, the interface
has no option to perform this action. We are now listing available
datasets from distributions in the import module.

Resolves: #101256
Releases: main, 12.4
Change-Id: I6fac0d22bbb42a6ff8b682b6c3415a3d7e4982d6
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/79863


Tested-by: core-ci <typo3@b13.com>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Benni Mack <benni@typo3.org>