[BUG] Fix flaky tests under StartReplicationIT

[saikaranam-amazon]

Describe the bug
Intermittent errors during CI workflow under StartReplicationIT

REPRODUCE WITH: ./gradlew ':integTest' --tests "org.opensearch.replication.integ.rest.StartReplicationIT.test leader stats" -Dtests.seed=95FE73AD2A5DC9E3 -Dtests.security.manager=true -Dtests.locale=es-VE -Dtests.timezone=America/Anchorage -Druntime.java=14

org.opensearch.replication.integ.rest.StartReplicationIT > test leader stats FAILED
    org.junit.ComparisonFailure: expected:<"[50]"> but was:<"[49]">
        at __randomizedtesting.SeedInfo.seed([95FE73AD2A5DC9E3:B67CBD92302A19A5]:0)
        at jdk.internal.reflect.GeneratedConstructorAccessor20.newInstance(Unknown Source)
        at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500)
        at org.opensearch.replication.integ.rest.StartReplicationIT$test leader stats$1.run(StartReplicationIT.kt:1016)
        at org.opensearch.test.OpenSearchTestCase.assertBusy(OpenSearchTestCase.java:1048)
        at org.opensearch.test.OpenSearchTestCase.assertBusy(OpenSearchTestCase.java:1021)
        at org.opensearch.replication.integ.rest.StartReplicationIT.test leader stats(StartReplicationIT.kt:1012)