[TesterBundle] Fix AutowireServiceMock broken by Symfony 6.4.34 TestContainer::set() change

[kiloumap]

Summary

Symfony 6.4.34 refactored TestContainer::set() from a try/catch pattern to a proactive check, which broke mock injection for all services registered in the test private services locator.

Old behavior (Symfony 6.4.31 — worked)

public function set(string $id, mixed $service): void
{
    $container = $this->getPublicContainer();
    $renamedId = $this->renamedIds[$id] ?? $id;

    try {
        $container->set($renamedId, $service);  // stores in $container->services
    } catch (InvalidArgumentException $e) {
        if (!str_starts_with($e->getMessage(), "The \"$renamedId\" service is private")) {
            throw $e;
        }
        $container->privates[$renamedId] = $service;  // only reached on exception
    }
}

Container::set() was called first, storing the mock in $container->services. The fallback to $container->privates only happened if an exception was thrown (which it wasn't for these services).

New behavior (Symfony 6.4.34 — broken)

public function set(string $id, mixed $service): void
{
    $container = $this->getPublicContainer();
    $renamedId = $this->renamedIds[$id] ?? $id;

    if (!$this->getPrivateContainer()->has($renamedId)) {
        $container->set($renamedId, $service);
    } else {
        $container->privates[$renamedId] = $service;  // always reached in test env
    }
}

The new code checks getPrivateContainer()->has() first. In the test environment, all services are registered in test.private_services_locator, so mocks always go to $container->privates — never reaching $container->services.

Impact

Compiled service factories only resolve dependencies from $container->services, so they never see the mocks and create real service instances instead. This causes issues like infinite loops with real HTTP calls leading to OOM (6GB+ memory exhausted).

Fix

Bypass TestContainer::set() entirely by calling Container::set() directly on the public container (accessed via reflection on TestContainer::getPublicContainer()). This ensures mocks are stored in $container->services where compiled factories can find them.