[GeneratorBundle] Deprecations

[dannyvw]

Merge is deprecated and will be removed in ORM 3 https://github.com/Kunstmaan/KunstmaanBundlesCMS/blob/7.x/src/Kunstmaan/GeneratorBundle/DataFixtures/ORM/UserFixtures.php#L42

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https://github.com/Kunstmaan/KunstmaanBundlesCMS/blob/7.x/src/Kunstmaan/GeneratorBundle/DataFixtures/ORM/GroupFixtures.php
Argument $class of Doctrine\Common\DataFixtures\AbstractFixture::getReference() will be mandatory in 2.0

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https://github.com/Kunstmaan/KunstmaanBundlesCMS/blob/7.x/src/Kunstmaan/GeneratorBundle/Helper/GeneratorUtils.php#L24
Deprecated: trim(): Passing null to parameter #1 ($string) of type string is deprecated

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Deprecations is triggered by this class https://github.com/Kunstmaan/KunstmaanBundlesCMS/blob/7.x/src/Kunstmaan/MediaBundle/DataFixtures/ORM/FolderFixtures.php
Nesting transactions without enabling savepoints is deprecated.
Call Doctrine\DBAL\Connection::setNestTransactionsWithSavepoints(true) to enable savepoints.

[dannyvw]

The "Kunstmaan\GeneratorBundle\DataFixtures\ORM\UserFixtures" class implements "Symfony\Component\DependencyInjection\ContainerAwareInterface" that is deprecated since Symfony 6.4, use dependency injection instead.