[FEATURE] Add Maltese (mt) as supported language

This change adds support for Maltese to be selected as
TYPO3 Language and to connect to TYPO3 Localizations
(XLF files, Site Configuration) by default.

Maltese language is spoken in Malta.

Also see https://en.wikipedia.org/wiki/Languages_of_Malta

Resolves: #103331
Releases: main
Change-Id: Ib8bb4112f094f9379e8d46c90291b281335ade4d
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/83319


Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Marvin Buchmann <marvin_buchmann@web.de>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Marvin Buchmann <marvin_buchmann@web.de>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>