[12.x] Pause a queue for given seconds

[rodrigopedra]

PR #57800 added the QueueManager@pause() method to allow pausing a given queue.

This method pauses the queue indefinitely by using a cache's store forever() method.

As such a queue can only be resumed by calling the QueueManager@resume() method added in the same PR.

When consuming an external API with rate limiting, one can get a 429 response when the rate limit is surpassed.

Often times this response is accompanied by the Retry-After header that gives the number of seconds to wait before retrying.

Currently, one would need to keep track of those seconds to manually pause a queue (when a 429 response is received) and manually resume a queue (when the timeout is expired).

This PR

• Adds the QueueManager@pauseFor() method that allows passing the number of seconds a queue should be paused.
• Fixes some test cases and adds relevant assertions to test for the presented use case.
  • It seems the original PR aimed for allowing the seconds to be passed, so there were already tests in place testing for a third $seconds argument.