Fix: set receive queue size for sinks #4091
Merged
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Motivation
Currently, the receiveQueueSize config does not get set according when creating or updating sinks.
Modifications
Fix the bug and also add tests.
This should also help stabilize the sink related tests in PulsarFunctionsE2ETest.
Will have another PR to stabilize the source related tests in PulsarFunctionsE2ETest.