Release BlockReader in CRC check

### What changes are proposed in this pull request?

Please outline the changes and how this PR fixes the issue.

### Why are the changes needed?

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  1. If you propose a new API, clarify the use case for a new API.
  2. If you fix a bug, describe the bug.

### Does this PR introduce any user facing changes?

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  1. change in user-facing APIs
  2. addition or removal of property keys
  3. webui

			pr-link: #18695
			change-id: cid-fba7d00da83719d31df0d917e1419ed049adeed8

Author: elega

core/common/src/main/java/alluxio/Sessions.java

@@ -36,9 +36,10 @@ public class Sessions {
   public static final int CACHE_UFS_SESSION_ID = -8;
 
   public static final int LOAD_SESSION_ID = -9;
+  public static final int WORKER_CHECKSUM_CHECK_SESSION_ID = -10;
 
   // internal session id base should be smaller than all predefined session ids
-  public static final long INTERNAL_SESSION_ID_BASE = -8;
+  public static final long INTERNAL_SESSION_ID_BASE = -11;
 
   /** Map from SessionId to {@link alluxio.SessionInfo} object. */
   private final Map<Long, SessionInfo> mSessions;

core/server/worker/src/main/java/alluxio/worker/block/DefaultBlockWorker.java

@@ -637,10 +637,10 @@ public Map<Long, BlockChecksum> calculateBlockChecksum(List<Long> blockIds) {
     for (long blockId : blockIds) {
       Future<?> future = mChecksumCalculationThreadPool.submit(() -> {
         ByteBuffer bf = null;
-        try {
+        try (BlockReader br = mBlockStore.createBlockReader(
+            Sessions.WORKER_CHECKSUM_CHECK_SESSION_ID,
+            blockId, 0, false, Protocol.OpenUfsBlockOptions.getDefaultInstance())) {
           CRC64 crc64 = new CRC64();
-          BlockReader br = mBlockStore.createBlockReader(
-              -1, blockId, 0, false, Protocol.OpenUfsBlockOptions.getDefaultInstance());
           if (mChecksumCalculationUsingBufferPool) {
             bf = NioHeapBufferPool.acquire(chunkSize);
           } else {