[MINOR] improvement(server): LocalFileNioWriter support writeIndex api (

#2320)

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

Support WriteIndex api for LocalFileNioWriter.

### Why are the changes needed?

- Finish the suggestion left in #2223 (comment) 
- Introduce the `LocalFileNullDeviceWriter` in the follow up PR.

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

No.

### How was this patch tested?

No need.

storage/src/main/java/org/apache/uniffle/storage/handler/impl/LocalFileNioWriter.java

@@ -17,6 +17,8 @@
 
 package org.apache.uniffle.storage.handler.impl;
 
+import java.io.BufferedOutputStream;
+import java.io.DataOutputStream;
 import java.io.File;
 import java.io.FileOutputStream;
 import java.io.IOException;
@@ -30,6 +32,7 @@
 
 public class LocalFileNioWriter implements FileWriter {
 
+  private DataOutputStream dataOutputStream;
   private FileOutputStream fileOutputStream;
   private long nextOffset;
 
@@ -40,6 +43,8 @@ public LocalFileNioWriter(File file) throws IOException {
 
   public LocalFileNioWriter(File file, int bufferSize) throws IOException {
     fileOutputStream = new FileOutputStream(file, true);
+    // init fsDataOutputStream
+    dataOutputStream = new DataOutputStream(new BufferedOutputStream(fileOutputStream, bufferSize));
     nextOffset = file.length();
   }
 
@@ -61,7 +66,12 @@ public void writeData(ByteBuf buf) throws IOException {
 
   @Override
   public void writeIndex(FileBasedShuffleSegment segment) throws IOException {
-    throw new UnsupportedOperationException("LocalFileNioWriter does not support index");
+    dataOutputStream.writeLong(segment.getOffset());
+    dataOutputStream.writeInt(segment.getLength());
+    dataOutputStream.writeInt(segment.getUncompressLength());
+    dataOutputStream.writeLong(segment.getCrc());
+    dataOutputStream.writeLong(segment.getBlockId());
+    dataOutputStream.writeLong(segment.getTaskAttemptId());
   }
 
   @Override
@@ -71,8 +81,8 @@ public long nextOffset() {
 
   @Override
   public synchronized void close() throws IOException {
-    if (fileOutputStream != null) {
-      fileOutputStream.close();
+    if (dataOutputStream != null) {
+      dataOutputStream.close();
     }
   }
 }