node-api: make reference weak parameter an indirect link to references

As the cancellation of second pass callbacks are not reachable from the
current v8 API, and the second pass callbacks are scheduled with
NodePlatform's task runner, we have to ensure that the weak parameter
holds indirect access to the v8impl::Reference object so that the object
can be destroyed on addon env teardown before the whole node env is able
to shutdown.

PR-URL: https://github.com/nodejs/node/pull/38000


Reviewed-By: Michael Dawson <midawson@redhat.com>
Reviewed-By: Gabriel Schulhof <gabriel.schulhof@intel.com>