Flaky test: NettyHttpServerConnectionDrainTest

[idelpivnitskiy]

https://github.com/apple/servicetalk/actions/runs/20862469417/job/59945346507?pr=3390

> Task :servicetalk-http-netty:test

NettyHttpServerConnectionDrainTest > requestIsAutoDrainedWhenUserFailsToConsumeAndResponseBodyFails() FAILED
    org.opentest4j.AssertionFailedError: expected: <true> but was: <false>
        at app//org.junit.jupiter.api.AssertionFailureBuilder.build(AssertionFailureBuilder.java:151)
        at app//org.junit.jupiter.api.AssertionFailureBuilder.buildAndThrow(AssertionFailureBuilder.java:132)
        at app//org.junit.jupiter.api.AssertTrue.failNotTrue(AssertTrue.java:63)
        at app//org.junit.jupiter.api.AssertTrue.assertTrue(AssertTrue.java:36)
        at app//org.junit.jupiter.api.AssertTrue.assertTrue(AssertTrue.java:31)
        at app//org.junit.jupiter.api.Assertions.assertTrue(Assertions.java:183)