util: improve inspect edge cases

This makes sure `compact` number mode causes small proxies and map
entries to be printed on a single line.

It also fixed the line break calculation for `compact` mode when not
set to `true`. It now also adds the additional whitespace, comma and
quotes to the formula to prevent exceeding the `breakLength`.

PR-URL: https://github.com/nodejs/node/pull/27109


Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Minwoo Jung <minwoo@nodesource.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>