[BUGFIX] Allow empty page id for pageId in log module

Allow empty strings as valid input for the page id in the log module.

Resolves: #103290
Releases: main, 12.4
Change-Id: I5b4cc0970db927ae1510124d30348059016165a2
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/83396


Tested-by: core-ci <typo3@b13.com>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>