[Backport 2.17] [Backport] [2.x] Fix flaky org.opensearch.rest.ReactorNetty4StreamingStressIT.testCloseClientStreamingRequest test case (#15859)

[Backport 2.17] [Backport] [2.x] Fix flaky org.opensearch.rest.ReactorNetty4StreamingStressIT.testCloseClientStreamingRequest test case (#15859) #99153