Add deletion helper to reduce complexity

[jkniest]

Before (v2):

class ClearCategoriesFixture extends Fixture
{
    public function __construct(
        private EntityRepository $categoryRepository,
    ) {
    }

    public function load(FixtureBag $bag): void
    {
        $this->removeAllCategories();
    }

    private function removeAllCategories(): void
    {
        $this->deleteCategoryForLevel(4);
        $this->deleteCategoryForLevel(3);
        $this->deleteCategoryForLevel(2);
    }

    private function deleteCategoryForLevel(int $level): void
    {
        $criteria = (new Criteria())
            ->addFilter(new EqualsFilter('level', $level));

        $ids = $this->categoryRepository
            ->searchIds($criteria, Context::createDefaultContext())
            ->getData();

        $this->categoryRepository->delete(
            array_values($ids),
            Context::createDefaultContext()
        );
    }

After (v3):

class ClearDockwareDataFixture extends Fixture
{
    public function load(): void
    {
        $this->removeAllCategories();
    }

    private function removeAllCategories(): void
    {
        $this->deleteCategoryForLevel(4);
        $this->deleteCategoryForLevel(3);
        $this->deleteCategoryForLevel(2);
    }

    private function deleteCategoryForLevel(int $level): void
    {
        $this->helper->Database()->deleteEntities(
            'category',
            (new Criteria())->addFilter(new EqualsFilter('level', $level)),
        );
    }

Optimizations:

• Helper is now included in every fixture
• No need to manually fetch the repository anymore