http: there is no `corked` property of `stream`

Do not check/use unexistent property, use `OutgoingMessage` instead.

PR-URL: https://github.com/nodejs/node/pull/18325


Reviewed-By: Mithun Sasidharan <mithunsasidharan89@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>