[BUGFIX] Cover invalid type `db` input in ContentObjectRenderer->getData

Resolves: #99207
Releases: main, 11.5
Change-Id: I222a861578a7b1b683b7922bcdf55776b96b4648
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/76840


Tested-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Nikita Hovratov <nikita.h@live.de>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Benni Mack <benni@typo3.org>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: Nikita Hovratov <nikita.h@live.de>