IBX-12606: Migrated the test suites to PHPUnit 11

[ViniTou]

🎫 Issue	IBX-12606

Related PRs:

• IBX-12606: Migrated the test suite to PHPUnit 11 http-cache#93, https://github.com/ibexa/connector-qualifio/pull/67 (pilots of the same wave)
• ibexa/core PHPUnit 11 PR (in progress)

Important

PHPUnit 11 only. phpunit/phpunit ^11.5 moves to require, because src/ ships PHPUnit code (ContainsPath constraint, MenuAssert, AbstractTranslationCase, IbexaKernelTestCase). A consumer still on PHPUnit ^9 cannot resolve ibexa/test-core ~6.0.x-dev after this merges — merge it once the consumers have their PHPUnit 11 PRs ready (or last in the wave).

Description:

PHPUnit 9 → 11 for ibexa/test-core (Symfony 8 upgrade prerequisite; the org-wide wave migrates every 6.0 repo).

• phpunit/phpunit: require-dev ^9 → require ^11.5; symfony/phpunit-bridge ^5.4 → ^7.4.
• phpunit.xml.dist on the 11.5 schema: <listeners> SymfonyTestsListener → <extensions><bootstrap class="Symfony\Bridge\PhpUnit\SymfonyExtension"/>, cacheDirectory=".phpunit.cache" (gitignored).
• src/contracts/.../ContainsPath::matches($other) → matches(mixed $other): PHPUnit 11 typed the parent Constraint::matches() signature (a real PHPStan error, not test noise).
• AbstractTranslationCase: the @dataProvider docblock kept for PHPUnit 9 next to the #[DataProvider] attribute is gone.
• Tests: @dataProvider/@covers annotations → attributes (13 files); one stale phpstan-baseline.neon entry (attribute.notFound for DataProvider) pruned.

Verified: 45 tests green, 0 PHPUnit deprecations; PHPStan no errors; code style clean; rector dry-run clean. Consumer smoke test: ibexa/connector-qualifio (phpunit-11 branch) unit suite green with this branch pinned as a path repository.

For QA:

N/A — test tooling only.

Documentation:

N/A

[mikadamczyk]

Looks good, only the conflict needs to be resolved