console: console.countReset() should emit warning

The Console Standard specifies that console.countReset()
should emit some type of a warning when given a label that
has no previous account associated with it. This PR brings
node's implementation of console.countReset() up-to-spec and
adds a test asserting that a warning is emitted.

Fixes: https://github.com/nodejs/node/issues/20524

PR-URL: https://github.com/nodejs/node/pull/21649


Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Minwoo Jung <minwoo@nodesource.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>