fs: guarantee order of callbacks in ws.close

Refactor WriteStream.prototype.close and WriteStream.prototype._destroy
to always call the callback passed to close in order. Protects from
calling .close() without a callback.

Fixes: https://github.com/nodejs/node/issues/17951
See: https://github.com/nodejs/node/pull/15407

PR-URL: https://github.com/nodejs/node/pull/18002
Fixes: https://github.com/nodejs/node/issues/17951


Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: James M Snell <jasnell@gmail.com>