Flaky test: TestFetchTaggedResultsAccumulatorGenerativeConsistencyCheck

[andrewmains12]

The test TestFetchTaggedResultsAccumulatorGenerativeConsistencyCheck is timing out occasionally on CI.

Steps to repro:

go test -test.v -tags=big ./src/dbnode/client/ -test.run 'TestAggregateResultsAccumulatorGenerativeConsistencyCheck' -test.count=100 -test.timeout=10s

Output:
https://gist.github.com/andrewmains12/4b8f2717943dada08031bf060409541a

If -test.count=100 doesn't do it, try -test.count=1000.

Sample buildkite failure