[#6277] improve(CLI): Fix AreYouSure Scanner should close. (#6285)

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

Fix AreYouSure Scanner should close.

### Why are the changes needed?

Fix: #6277 

### Does this PR introduce _any_ user-facing change?

No.

### How was this patch tested?

local test.

clients/cli/src/main/java/org/apache/gravitino/cli/AreYouSure.java

@@ -32,16 +32,20 @@ public class AreYouSure {
    * @return {@code true} if the action is to continue {@code false} otherwise.
    */
   public static boolean really(boolean force) {
-    Scanner scanner = new Scanner(System.in, StandardCharsets.UTF_8.name());
-
     /* force option for scripting */
     if (force) {
       return true;
     }
 
-    System.out.println(
-        "This command could result in data loss or other issues. Are you sure you want to do this? (Y/N)");
-    String answer = scanner.next();
-    return answer.equals("Y");
+    try (Scanner scanner = new Scanner(System.in, StandardCharsets.UTF_8.name())) {
+      System.out.println(
+          "This command could result in data loss or other issues. Are you sure you want to do this? (Y/N)");
+      String answer = scanner.next();
+      return "Y".equals(answer);
+    } catch (Exception e) {
+      System.err.println("Error while reading user input: " + e.getMessage());
+      Main.exit(-1);
+    }
+    return false;
   }
 }

clients/cli/src/test/java/org/apache/gravitino/cli/TestAreYouSure.java

@@ -0,0 +1,60 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.gravitino.cli;
+
+import java.io.ByteArrayInputStream;
+import java.nio.charset.StandardCharsets;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+public class TestAreYouSure {
+
+  @Test
+  void testCommandWithForce() {
+    Assertions.assertTrue(AreYouSure.really(true));
+  }
+
+  @Test
+  void testCommandWithInputY() {
+    ByteArrayInputStream inputStream =
+        new ByteArrayInputStream("Y".getBytes(StandardCharsets.UTF_8));
+    System.setIn(inputStream);
+
+    Assertions.assertTrue(AreYouSure.really(false));
+  }
+
+  @Test
+  void testCommandWithInputN() {
+    ByteArrayInputStream inputStream =
+        new ByteArrayInputStream("N".getBytes(StandardCharsets.UTF_8));
+    System.setIn(inputStream);
+
+    Assertions.assertFalse(AreYouSure.really(false));
+  }
+
+  @Test
+  void testCommandWithInputInvalid() {
+    ByteArrayInputStream inputStream =
+        new ByteArrayInputStream("Invalid".getBytes(StandardCharsets.UTF_8));
+    System.setIn(inputStream);
+
+    Assertions.assertFalse(AreYouSure.really(false));
+  }
+}