[BUGFIX] Sanitize FlashMessage->createFromArray()

Resolves: #104249
Releases: main, 12.4
Change-Id: I2e56c967ab27ddc855261ff53f654d5916f3dce6
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/84997


Reviewed-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Oliver Bartsch <bo@cedev.de>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>