[TASK] Change return type of TextDescriptor::describeApplication

To prevent issues when upgrading to Symfony 6.3.x-dev the return type
of TextDescriptor::describeApplication is changed to void.

Releases: main
Resolves: #100324
Change-Id: I4663202abda3ef49287306bde0125af223d1b026
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/78278


Reviewed-by: Benni Mack <benni@typo3.org>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Tested-by: Benni Mack <benni@typo3.org>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>