[BUG] org.opensearch.http.SearchRestCancellationIT.testAutomaticCancellationDuringFetchPhase flaky

[dblock]

#4587 (comment)

[dbwiddis]

All three failing test runs (7167,7463,8142) had node failures. The test failures may be a random symptom.

[dbwiddis]

Ran test 500 times, no repro.

[ashking94]

#6262 (comment)

[Gankris96]

I also see org.opensearch.http.SearchRestCancellationIT.testAutomaticCancellationDuringQueryPhase in this same test suite SearchRestCancellationIT is also flaky