n-api: use AsyncResource for Work tracking

Enable combining N-API async work with async-hooks.

PR-URL: https://github.com/nodejs/node/pull/14697


Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Jason Ginchereau <jasongin@microsoft.com>
Reviewed-By: Michael Dawson <mhdawson@ibm.com>