[TASK] Tests: Have jangregor/phpstan-prophecy:^1.0

Having jangregor/phpstan-prophecy and including it
in the phpstan config cuts the baseline by ~half.
Details can now be sorted out with single patches.

> composer req --dev jangregor/phpstan-prophecy:^1.0
> Build/Scripts/runTests.sh -s phpstanGenerateBaseline

Resolves: #96684
Releases: main, 11.5
Change-Id: I7a2a8fd4a40a1a791d7622b506680a53e73187f9
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/73212


Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>