[Fix][Connector-V2] Fix doris TRANSFER_ENCODING header error (#7267)

Author: liugddx

seatunnel-connectors-v2/connector-doris/src/main/java/org/apache/seatunnel/connectors/doris/util/HttpUtil.java

@@ -21,6 +21,7 @@
 import org.apache.http.impl.client.DefaultRedirectStrategy;
 import org.apache.http.impl.client.HttpClientBuilder;
 import org.apache.http.impl.client.HttpClients;
+import org.apache.http.protocol.RequestContent;
 
 /** util to build http client. */
 public class HttpUtil {
@@ -32,7 +33,8 @@ public class HttpUtil {
                                 protected boolean isRedirectable(String method) {
                                     return true;
                                 }
-                            });
+                            })
+                    .addInterceptorLast(new RequestContent(true));;
 
     public CloseableHttpClient getHttpClient() {
         return httpClientBuilder.build();