util: fix map entries inspection

This makes sure the arrays returned by Map#entries() are handled as
any other array instead of just visualizing the entries as array.
Therefore options should have an impact on the arrays.

PR-URL: https://github.com/nodejs/node/pull/26918


Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Signed-off-by: Beth Griggs <Bethany.Griggs@uk.ibm.com>