cherry-pick [Alert] [HTTP Plugin] Lose HTTP port

#14341

dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-http/src/main/java/org/apache/dolphinscheduler/plugin/alert/http/HttpSender.java

@@ -113,7 +113,8 @@ public final class HttpSender {
             //GET request add param in url
             setMsgInUrl(msg);
             URL unencodeUrl = new URL(url);
-            URI uri = new URI(unencodeUrl.getProtocol(), unencodeUrl.getHost(), unencodeUrl.getPath(), unencodeUrl.getQuery(), null);
+            URI uri = new URI(unencodeUrl.getProtocol(), unencodeUrl.getAuthority(), unencodeUrl.getPath(),
+                    unencodeUrl.getQuery(), null);
 
             httpRequest = new HttpGet(uri);
             setHeader();
@@ -164,4 +165,8 @@ public final class HttpSender {
             logger.error("send http alert msg  exception : {}", e.getMessage());
         }
     }
+
+    public String getRequestUrl() {
+        return httpRequest.getURI().toString();
+    }
 }