Support Symfony 7

[alexandre-daubois]

Opened this one in favor of #1326, #1328 and #1331.

The goal is to unite the work of all other PRs and debug this until we have the awaited compatibility 🙂

The only remaining failure is strange, I don't understand it:

1) Enqueue\SnsQs\Tests\Spec\SnsQsSendToTopicAndReceiveNoWaitFromQueueTest::test
Failed asserting that null is an instance of interface "Interop\Queue\Message".

/mqdev/vendor/queue-interop/queue-spec/src/SendToTopicAndReceiveNoWaitFromQueueSpec.php:50
/mqdev/pkg/test/RetryTrait.php:26

I'm having a look at it but please share any info if you have an idea 😄 But I could not find any info about SNSQS, has it been dropped? 🤔 This would explain the failure.