http: reduce usage of public util

Backport-PR-URL: #26650
PR-URL: #26548
Refs: #26546
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

Author: ZYSzys

lib/_http_agent.js

@@ -24,7 +24,7 @@
 const net = require('net');
 const util = require('util');
 const EventEmitter = require('events');
-const debug = util.debuglog('http');
+const debug = require('internal/util/debuglog').debuglog('http');
 const { async_id_symbol } = require('internal/async_hooks').symbols;
 
 // New Agent code.

lib/_http_common.js

@@ -36,7 +36,7 @@ const {
   readStop
 } = incoming;
 
-const debug = require('util').debuglog('http');
+const debug = require('internal/util/debuglog').debuglog('http');
 
 const kIncomingMessage = Symbol('IncomingMessage');
 const kOnHeaders = HTTPParser.kOnHeaders | 0;