n-api: rename 'promise' parameter to 'value'

This change makes it clear that the value doesn't need to be a
Promise, and makes the signature consistent with other napi_is_*
functions.

PR-URL: https://github.com/nodejs/node/pull/31544


Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: David Carlier <devnexen@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>