Added changes for issue#3009.

1. Used try-with-resources along with nested try-catch to manage resources, fixing out of scope variable.
2. Added similar fix for issue#3007 and issue#3008 to fix compilation error due to out of scope variable in catch block.

Author: Zaar

Diff for: eventmesh-runtime/src/main/java/org/apache/eventmesh/runtime/admin/handler/GrpcClientHandler.java

@@ -103,7 +103,8 @@ void delete(HttpExchange httpExchange) throws IOException {
             Error error = new Error(e.toString(), stackTrace);
             String result = JsonUtils.toJSONString(error);
             httpExchange.sendResponseHeaders(500, result.getBytes().length);
-            out.write(result.getBytes());
+
+            log.error(result, e);
         }
     }
 

Diff for: eventmesh-runtime/src/main/java/org/apache/eventmesh/runtime/admin/handler/HTTPClientHandler.java

@@ -95,7 +95,8 @@ void delete(HttpExchange httpExchange) throws IOException {
             Error error = new Error(e.toString(), stackTrace);
             String result = JsonUtils.toJSONString(error);
             httpExchange.sendResponseHeaders(500, result.getBytes().length);
-            out.write(result.getBytes());
+
+            log.error(result, e);
         }
     }