[BUG] org.opensearch.indices.IndicesRequestCacheIT.testStaleKeysCleanupWithLowThreshold {p0={"opensearch.experimental.feature.pluggable.caching.enabled":"true"}} is flaky

[BUG] org.opensearch.indices.IndicesRequestCacheIT.testStaleKeysCleanupWithLowThreshold {p0={"opensearch.experimental.feature.pluggable.caching.enabled":"true"}} is flaky #6172