[BUGFIX] Prevent RuntimeException in NewPages view

Page types might contain a static string as
label instead of a locallang key. To prevent
a RuntimeException, the static string is used
as the default now.

Resolves: #103315
Releases: main, 12.4
Change-Id: I50858fe6500766e5a66b83e9e72be82c35218ca2
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/83293


Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Jochen Roth <rothjochen@gmail.com>
Tested-by: Oliver Bartsch <bo@cedev.de>
Tested-by: Jochen Roth <rothjochen@gmail.com>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: core-ci <typo3@b13.com>