[TASK] Update to phpstan/phpstan:^1.4.5

This brings a couple of fixes for false positives
that shrink the baseline by around 90 errors.

> composer req --dev phpstan/phpstan:^1.4.5
> Build/Scripts/runTests.sh -s phpstanGenerateBaseline

Change-Id: I47ba88117866a59f2b7760539f1be217d1bcde34
Resolves: #96747
Releases: main, 11.5
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/73295


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