benchmark: add bench for zlib gzip + gunzip cycle

Originally wrote this for some work that is going to take a while
longer before it’s ready to be PR’ed, so it seems fine to start
with this on its own.

PR-URL: https://github.com/nodejs/node/pull/20034


Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>