KAFKA-19286: Fix flaky testConcurrentRemoveReadForCache1 (#20893)

Reviewers: Mickael Maison <mickael.maison@gmail.com>

Author: UladzislauBlok

storage/src/test/java/org/apache/kafka/storage/internals/log/RemoteIndexCacheTest.java

@@ -19,7 +19,6 @@
 import org.apache.kafka.common.TopicIdPartition;
 import org.apache.kafka.common.TopicPartition;
 import org.apache.kafka.common.Uuid;
-import org.apache.kafka.common.test.api.Flaky;
 import org.apache.kafka.common.utils.Utils;
 import org.apache.kafka.server.log.remote.storage.RemoteLogSegmentId;
 import org.apache.kafka.server.log.remote.storage.RemoteLogSegmentMetadata;
@@ -122,7 +121,7 @@ public void setup() throws IOException, RemoteStorageException {
         rlsMetadata = new RemoteLogSegmentMetadata(remoteLogSegmentId, baseOffset, lastOffset, time.milliseconds(),
                 brokerId, time.milliseconds(), segmentSize, Collections.singletonMap(0, 0L));
         cache = new RemoteIndexCache(defaultRemoteIndexCacheSizeBytes, rsm, logDir.toString());
-        cache.setFileDeleteDelayMs(0);
+        cache.setFileDeleteDelayMs(20);
         mockRsmFetchIndex(rsm);
     }
 
@@ -773,7 +772,6 @@ public void testCorruptCacheIndexFileExistsButNotInCache(IndexType indexType) th
     }
 
     @Test
-    @Flaky("KAFKA-19286")
     public void testConcurrentRemoveReadForCache1() throws IOException, InterruptedException, ExecutionException {
         // Create a spy Cache Entry
         RemoteIndexCache.Entry spyEntry = generateSpyCacheEntry();