[BUG] org.opensearch.snapshots.SearchableSnapshotIT.testCacheFilesAreClosedAfterUse is flaky

[reta]

Describe the bug

New test failure:

EPRODUCE WITH: ./gradlew ':server:internalClusterTest' --tests "org.opensearch.snapshots.SearchableSnapshotIT.testCacheFilesAreClosedAfterUse" -Dtests.seed=91AB376F4EA0A90 -Dtests.security.manager=true -Dtests.jvm.argline="-XX:TieredStopAtLevel=1 -XX:ReservedCodeCacheSize=64m" -Dtests.locale=es-NI -Dtests.timezone=America/Thule -Druntime.java=19
  2> java.lang.AssertionError: timed out waiting for green state
        at __randomizedtesting.SeedInfo.seed([91AB376F4EA0A90:54EDA28D5C95D6DF]:0)
        at org.junit.Assert.fail(Assert.java:89)
        at org.opensearch.test.OpenSearchIntegTestCase.ensureColor(OpenSearchIntegTestCase.java:1001)
        at org.opensearch.test.OpenSearchIntegTestCase.ensureGreen(OpenSearchIntegTestCase.java:932)
        at org.opensearch.test.OpenSearchIntegTestCase.ensureGreen(OpenSearchIntegTestCase.java:921)
        at org.opensearch.snapshots.SearchableSnapshotIT.restoreSnapshotAndEnsureGreen(SearchableSnapshotIT.java:326)
        at org.opensearch.snapshots.SearchableSnapshotIT.testCacheFilesAreClosedAfterUse(SearchableSnapshotIT.java:562)

To Reproduce
See please https://build.ci.opensearch.org/job/gradle-check/12473/

Expected behavior
Test should always pass

Plugins
Standart

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

• CI

Additional context
Add any other context about the problem here.

[kotwanikunal]

@tlfeng Can you please take a look at this?