test: invalid chars in http client path

This test adds coverage for all the characters which are considered
invalid in a http path.

PR-URL: https://github.com/nodejs/node/pull/11964


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