test: check bundled binaries are signed on macOS

For notarization on macOS all packaged binaries must be signed. Add a
regression test to check that known binaries from our dependencies
(at the time of this commit term-size via npm) are signed.

Signed-off-by: Richard Lau <riclau@uk.ibm.com>

PR-URL: https://github.com/nodejs/node/pull/32522


Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>