[#2370] Improvement: Fix the warning: [unchecked] unchecked call to a…

…dd(E) as a member of the raw type List (#2371)

### What changes were proposed in this pull request?
Fix the warning: [unchecked] unchecked call to add(E) as a member of the raw type List

### Why are the changes needed?
Fix: #2370

### Does this PR introduce _any_ user-facing change?
No.

### How was this patch tested?
<img width="1382" alt="image" src="https://github.com/user-attachments/assets/e2c9aab9-d936-42ee-9540-26a789c84a07" />

common/src/main/java/org/apache/uniffle/common/ReconfigurableRegistry.java

@@ -66,7 +66,8 @@ public static synchronized void register(String key, ReconfigureListener listene
    * @param listener the given property listener
    */
   public static synchronized void register(Set<String> keys, ReconfigureListener listener) {
-    List listenerList = LISTENER_MAP.computeIfAbsent(keys, k -> new ArrayList<>());
+    List<ReconfigureListener> listenerList =
+        LISTENER_MAP.computeIfAbsent(keys, k -> new ArrayList<>());
     listenerList.add(listener);
   }