test: add basic WebAssembly test

Tests a basic WebAssembly module that adds two numbers.
wasm example from the WebAssembly/wabt repo licensed
Apache 2.0.

Refs: https://github.com/WebAssembly/wabt/blob/49b7984544ddaf14d5e2f1ad9115dad7e9a2b299/demo/wat2wasm/examples.js#L27-L32
PR-URL: https://github.com/nodejs/node/pull/16760


Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Myles Borins <myles.borins@gmail.com>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
Reviewed-By: Yuta Hiroto <hello@about-hiroppy.com>