fix: poll(timeout_ms=0) returns buffered records when coordinator times out#2718

HKanaparthi wants to merge 2 commits intodpkp:masterdpkp/kafka-python:masterfrom

HKanaparthi:fix/poll-timeout-zero-buffered-recordsHKanaparthi/kafka-python:fix/poll-timeout-zero-buffered-recordsCopy head branch name to clipboard