test: add an exception test to http-write-head

* Add an exception test.
* Add `common.mustCall()`.
* Make use of Arrow function.

PR-URL: https://github.com/nodejs/node/pull/11034


Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>