worker: add typechecking for postMessage transfer list

If the transfer list argument is present, it should be an array.
This commit adds typechecking to that effect. This aligns behaviour
with browsers.

PR-URL: https://github.com/nodejs/node/pull/28033


Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>