[TASK] Add `phpunit 11.2.0` as conflict version due to regression

PHPUnit refactored the double creation to support doubling
readonly classes [1], thus breaking classes where the class
constructor is called with constructor arguments, but calling
itself a class method which is mocked using the `onlyMethods()`
setup option. This leads now to some internal state setup issue
and is reported as `regression` [2] providing steps to reproduce
it.

This change adds `phpunit 11.2.0` as conflict to the monorepo
version to avoid using it in nightly tests for now, until a
proper regression fix has been implemented in phpunit.

Used command(s):

  \
    cat \
    <<< $(jq --indent 1 --tab \
      '."conflict" += {"phpunit/phpunit": "11.2.0"}' \
      composer.json) > composer.json \
    && Build/Scripts/runTests.sh -s composer -- update --lock

[1] https://github.com/sebastianbergmann/phpunit/pull/5804
[2] https://github.com/sebastianbergmann/phpunit/issues/5857

Resolves: #104007
Releases: main
Change-Id: Ia384ff98a9ea4e318738a48bd9ff8afcc4faff15
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/84533


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