[fix](fe) Fix Ranger Hive unit test initialization on branch-4.1

### What problem does this PR solve?

Related PR: #67414

Problem Summary: The backported Ranger Hive unit test attempts to initialize
lifecycleLock by reflection, but RangerHiveAccessController on branch-4.1 does
not have that field. This makes testPolicyRequestsUseLowerCaseSelect fail
with NoSuchFieldException before exercising row-filter or data-mask requests.
Remove the unsupported lock initialization and its unused imports and throws
clause while preserving both lowercase select assertions.

### Release note

None

### Check List (For Author)

- Test: Unit Test - ./run-fe-ut.sh --run org.apache.doris.catalog.authorizer.ranger.hive.RangerHiveAccessControllerTest (2 tests passed); Maven validate (Checkstyle passed).
- Behavior changed: No
- Does this need documentation: No

fe/fe-core/src/test/java/org/apache/doris/catalog/authorizer/ranger/hive/RangerHiveAccessControllerTest.java

@@ -26,9 +26,6 @@ import org.junit.Assert;
 import org.junit.Test;
 import org.mockito.Mockito;
 
-import java.lang.reflect.Field;
-import java.util.concurrent.locks.ReentrantReadWriteLock;
-
 public class RangerHiveAccessControllerTest {
     @Test
     public void testRangerAccessTypeMapping() {
@@ -39,12 +36,9 @@ public class RangerHiveAccessControllerTest {
     }
 
     @Test
-    public void testPolicyRequestsUseLowerCaseSelect() throws Exception {
+    public void testPolicyRequestsUseLowerCaseSelect() {
         RangerHiveAccessController controller = Mockito.mock(
                 RangerHiveAccessController.class, Mockito.CALLS_REAL_METHODS);
-        Field lifecycleLock = RangerHiveAccessController.class.getDeclaredField("lifecycleLock");
-        lifecycleLock.setAccessible(true);
-        lifecycleLock.set(controller, new ReentrantReadWriteLock());
         RangerBasePlugin plugin = Mockito.mock(RangerBasePlugin.class);
         UserIdentity currentUser = UserIdentity.createAnalyzedUserIdentWithIp("user", "%");
         RangerAccessRequestImpl rowFilterRequest = new RangerAccessRequestImpl();