test: fix incorrect expectation order

test-http-expect-handling.js has an instance of the test value and the
expected value being reversed.

Refs: https://nodejs.org/api/assert.html

PR-URL: https://github.com/nodejs/node/pull/23466


Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>