test: check mustCall errors in test-fs-read-type

PR-URL: https://github.com/nodejs/node/pull/36914
Refs: https://github.com/nodejs/node/pull/36190


Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>