fs: lazily load ReadFileContext

PR-URL: #55998
Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>
Reviewed-By: LiviaMedeiros <livia@cirno.name>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Jason Zhang <xzha4350@gmail.com>

Author: gurgunday

Diff for: lib/fs.js

@@ -162,6 +162,7 @@ let WriteStream;
 let rimraf;
 let rimrafSync;
 let kResistStopPropagation;
+let ReadFileContext;
 
 // These have to be separate because of how graceful-fs happens to do it's
 // monkeypatching.
@@ -363,7 +364,7 @@ function readFile(path, options, callback) {
   callback ||= options;
   validateFunction(callback, 'cb');
   options = getOptions(options, { flag: 'r' });
-  const ReadFileContext = require('internal/fs/read/context');
+  ReadFileContext ??= require('internal/fs/read/context');
   const context = new ReadFileContext(callback, options.encoding);
   context.isUserFd = isFd(path); // File descriptor ownership