assert: handle sparse arrays in deepStrictEqual

Detect sparse array ends and add a fail early path for
unequal array length.

PR-URL: https://github.com/nodejs/node/pull/15027


Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Yuta Hiroto <hello@about-hiroppy.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>