[BUG] org.opensearch.search.aggregations.bucket.DiversifiedSamplerIT.testNestedSamples {p0={"search.concurrent_segment_search.enabled":"true"}} is flaky

[reta]

Describe the bug
The test case org.opensearch.search.aggregations.bucket.DiversifiedSamplerIT.testNestedSamples {p0={"search.concurrent_segment_search.enabled":"true"}} is flaky:

org.opensearch.search.aggregations.bucket.DiversifiedSamplerIT.testNestedSamples {p0={"search.concurrent_segment_search.enabled":"true"}}

java.lang.AssertionError: 
Expected: a value less than or equal to <4L>
     but: <5L> was greater than <4L>
	at __randomizedtesting.SeedInfo.seed([D30D5DEAC663DE87:9ECE7E7BADC6DF04]:0)
	at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:18)
	at org.junit.Assert.assertThat(Assert.java:964)
	at org.junit.Assert.assertThat(Assert.java:930)
	at org.opensearch.search.aggregations.bucket.DiversifiedSamplerIT.testNestedSamples(DiversifiedSamplerIT.java:248)
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
	at java.base/java.lang.reflect.Method.invoke(Method.java:578)
	at com.carrotsearch.randomizedtesting.RandomizedRunner.invoke(RandomizedRunner.java:1750)
	at com.carrotsearch.randomizedtesting.RandomizedRunner$8.evaluate(RandomizedRunner.java:938)
	at com.carrotsearch.randomizedtesting.RandomizedRunner$9.evaluate(RandomizedRunner.java:974)
	at com.carrotsearch.randomizedtesting.RandomizedRunner$10.evaluate(RandomizedRunner.java:988)
	at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
	at org.junit.rules.RunRules.evaluate(RunRules.java:20)
	at org.apache.lucene.tests.util.TestRuleSetupTeardownChained$1.evaluate(TestRuleSetupTeardownChained.java:48)
	at org.apache.lucene.tests.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:43)
	at org.apache.lucene.tests.util.TestRuleThreadAndTestName$1.evaluate(TestRuleThreadAndTestName.java:45)
	at org.apache.lucene.tests.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:60)
	at org.apache.lucene.tests.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:44)
	at org.junit.rules.RunRules.evaluate(RunRules.java:20)

To Reproduce
Steps to reproduce the behavior:

• https://build.ci.opensearch.org/job/gradle-check/25586/
• https://build.ci.opensearch.org/job/gradle-check/25543/

Expected behavior
Test should always pass

Plugins
Standard

Screenshots
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Host/Environment (please complete the following information):

• CI

Additional context
Add any other context about the problem here.

[reta]

@sohami @neetikasinghal fyi :(

[dblock]

#10256 (comment)