util: add createClassWrapper to internal/util

Utility function for wrapping an ES6 class with a constructor
function that does not require the new keyword

PR-URL: https://github.com/nodejs/node/pull/11391


Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Sam Roberts <vieuxtech@gmail.com>