[BUGFIX] Replace access to non-existent TSFE property

The TSFE->cacheExpires property was removed in #102422. This
patch removes an existing property access and replaces it with
its successor in PrepareTypoScriptFrontendRendering middleware.

Resolves: #104975
Related: #102422
Releases: main
Change-Id: I106209ac5aa896abdd7838f6922cbb20f8411106
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/86105


Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>