n-api: factor out calling pattern

Factor out how we handle a `napi_status`-valued return internally.

Signed-off-by: Gabriel Schulhof <gabriel.schulhof@intel.com>
PR-URL: https://github.com/nodejs/node/pull/36113


Reviewed-By: Stephen Belanger <admin@stephenbelanger.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>