util: use constructor name

When reaching the depth limit util.inspect always prints [Array]
or [Object] no matter if it is a subclass or not.
This fixes it by showing the actual constructor name instead.

PR-URL: https://github.com/nodejs/node/pull/14886


Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Timothy Gu <timothygu99@gmail.com>
Reviewed-By: Yuta Hiroto <hello@about-hiroppy.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>