[TypeDeclaration] Handle getRepository() return via local variable in ReturnTypeFromGetRepositoryDocblockRector

[TomasVotruba]

Extends ReturnTypeFromGetRepositoryDocblockRector to also add the return type when the repository is fetched into a local variable, mutated, then returned - not only when returned directly.

Before

final class LeadModel
{
    public function __construct(private \Doctrine\ORM\EntityManagerInterface $em)
    {
    }

    /**
     * @return LeadListRepository
     */
    public function getRepository()
    {
        /** @var LeadListRepository $repo */
        $repo = $this->em->getRepository(LeadList::class);

        $repo->setDispatcher($this->dispatcher);
        $repo->setTranslator($this->translator);

        return $repo;
    }
}

After

final class LeadModel
{
    public function __construct(private \Doctrine\ORM\EntityManagerInterface $em)
    {
    }

    public function getRepository(): LeadListRepository
    {
        /** @var LeadListRepository $repo */
        $repo = $this->em->getRepository(LeadList::class);

        $repo->setDispatcher($this->dispatcher);
        $repo->setTranslator($this->translator);

        return $repo;
    }
}

Bails out when the returned variable is reassigned to a non-getRepository() expression, to avoid a wrong type.