fs: lazily load ReadFileContext

PR-URL: nodejs#55998
Reviewed-By: Yagiz Nizipli <[email protected]>
Reviewed-By: LiviaMedeiros <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Jason Zhang <[email protected]>

Author: gurgunday

lib/fs.js

@@ -163,6 +163,7 @@ let ReadStream;
 let WriteStream;
 let rimraf;
 let kResistStopPropagation;
+let ReadFileContext;
 
 // These have to be separate because of how graceful-fs happens to do it's
 // monkeypatching.
@@ -364,7 +365,7 @@ 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