[Messenger] Fix rejecting of pending messages #31396
Merged
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As discussed in #31387 (comment). It seems pending messages are not removed by calling xdel so we need to call xack first to remove them from the pending state and then call xdel to remove it from the complete stream.
It seems to be the correct way as mentioned in: https://github.com/antirez/redis/issues/5754
Test should be the same as added in: https://github.com/symfony/symfony/pull/31387/files#diff-46c1e03dafbcebc46b5cace7d05de20c