Fix the time check logic for judging stale client channels to be inac…

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

Fix bug involved by #18332.
Alter the time judgment logic for judging whether stale client channels are inactive. Using the LocaTime object cannot correctly judge whether a channel client is inactive, because a LocalTime plus or minus time offset only changes the hour, minute, second attribute value, and It will not affect the date, you actually need to use the LocalDateTime object instead.
### Why are the changes needed?

Please clarify why the changes are needed. For instance,
In the code, the LocaTime class is used to determine that a client channel is inactive. The LocalTime object adds or subtracts the time offset. It only changes the hour, minute and second attribute value and does not affect the date. In fact, you need to use the LocalDateTime object.  In other words, the three-day certification cycle judgment should be based on date and time, not just time.

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

Please list the user-facing changes introduced by your change, including
None

			pr-link: #18340
			change-id: cid-5b69e0c87d3bad8556ae27d491f3e0dc567378b9

dora/core/common/src/main/java/alluxio/security/authentication/DefaultAuthenticationServer.java

@@ -26,6 +26,7 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import java.time.LocalDateTime;
 import java.time.LocalTime;
 import java.util.ArrayList;
 import java.util.List;
@@ -160,12 +161,12 @@ public void close() {
    * stale.
    */
   private void cleanupStaleClients() {
-    LocalTime cleanupTime = LocalTime.now();
+    LocalDateTime cleanupTime = LocalDateTime.now();
     LOG.debug("Starting cleanup authentication registry at {}", cleanupTime);
     // Get a list of stale clients under read lock.
     List<UUID> staleChannels = new ArrayList<>();
     for (Map.Entry<UUID, AuthenticatedChannelInfo> clientEntry : mChannels.entrySet()) {
-      LocalTime lat = clientEntry.getValue().getLastAccessTime();
+      LocalDateTime lat = clientEntry.getValue().getLastAccessTime();
       if (lat.plusSeconds(mCleanupIntervalMs / 1000).isBefore(cleanupTime)) {
         staleChannels.add(clientEntry.getKey());
       }
@@ -201,7 +202,7 @@ protected void checkSupported(AuthType authType) {
    * and Sasl objects per channel.
    */
   class AuthenticatedChannelInfo {
-    private LocalTime mLastAccessTime;
+    private LocalDateTime mLastAccessTime;
     private AuthenticatedUserInfo mUserInfo;
     private AuthenticatedChannelServerDriver mSaslServerDriver;
 
@@ -213,17 +214,17 @@ public AuthenticatedChannelInfo(AuthenticatedUserInfo userInfo,
         AuthenticatedChannelServerDriver saslServerDriver) {
       mUserInfo = userInfo;
       mSaslServerDriver = saslServerDriver;
-      mLastAccessTime = LocalTime.now();
+      mLastAccessTime = LocalDateTime.now();
     }
 
     private synchronized void updateLastAccessTime() {
-      mLastAccessTime = LocalTime.now();
+      mLastAccessTime = LocalDateTime.now();
     }
 
     /**
      * @return the last access time
      */
-    public synchronized LocalTime getLastAccessTime() {
+    public synchronized LocalDateTime getLastAccessTime() {
       return mLastAccessTime;
     }