src,lib: make process.binding('config') internal

PR-URL: https://github.com/nodejs/node/pull/23400
Refs: https://github.com/nodejs/node/issues/22160
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>

lib/buffer.js

@@ -50,7 +50,7 @@ const {
 } = require('internal/util/types');
 const {
   pendingDeprecation
-} = process.binding('config');
+} = internalBinding('config');
 const {
   ERR_BUFFER_OUT_OF_BOUNDS,
   ERR_OUT_OF_RANGE,
@@ -1067,7 +1067,7 @@ Buffer.prototype.swap64 = function swap64() {
 Buffer.prototype.toLocaleString = Buffer.prototype.toString;
 
 let transcode;
-if (process.binding('config').hasIntl) {
+if (internalBinding('config').hasIntl) {
   const {
     icuErrName,
     transcode: _transcode