Use java.lang.ref.Cleaner to close cloned IndexInputs (#6351)

As detailed [in this issue][1], Lucene does not close the cloned
IndexInput instances, so we are using the Cleaner mechanism from the JDK
to close any unclosed clones.

A single static Cleaner instance to ensure any unclosed clone of an
IndexInput is closed. This instance creates a single daemon thread on
which it performs the cleaning actions. For an already-closed
IndexInput, the cleaning action is a no-op. For an open IndexInput, the
close action will decrement a reference count.

[1]: #5243 (comment)

Signed-off-by: Andrew Ross <[email protected]>

server/src/internalClusterTest/java/org/opensearch/snapshots/SearchableSnapshotIT.java

@@ -4,6 +4,7 @@
  */
 package org.opensearch.snapshots;
 
+import com.carrotsearch.randomizedtesting.annotations.ThreadLeakFilters;
 import com.carrotsearch.randomizedtesting.generators.RandomPicks;
 import org.hamcrest.MatcherAssert;
 import org.opensearch.action.admin.cluster.node.stats.NodesStatsResponse;
@@ -27,21 +28,23 @@
 import org.opensearch.common.util.FeatureFlags;
 import org.opensearch.index.Index;
 import org.opensearch.index.IndexNotFoundException;
+import org.opensearch.index.store.remote.file.CleanerDaemonThreadLeakFilter;
 import org.opensearch.monitor.fs.FsInfo;
 import org.opensearch.repositories.fs.FsRepository;
 
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.List;
 
+import static org.hamcrest.Matchers.contains;
 import static org.hamcrest.Matchers.equalTo;
 import static org.hamcrest.Matchers.greaterThan;
 import static org.hamcrest.Matchers.is;
-import static org.hamcrest.Matchers.contains;
 import static org.hamcrest.Matchers.notNullValue;
 import static org.opensearch.action.admin.cluster.node.stats.NodesStatsRequest.Metric.FS;
 import static org.opensearch.common.util.CollectionUtils.iterableAsArrayList;
 
+@ThreadLeakFilters(filters = CleanerDaemonThreadLeakFilter.class)
 public final class SearchableSnapshotIT extends AbstractSnapshotIntegTestCase {
 
     @Override