src: expose `node::AddPromiseHook`

Expose `node::AddPromiseHook`, which wraps V8’s `SetPromiseHook` in
a way that allows multiple hooks to be set up.

PR-URL: https://github.com/nodejs/node/pull/12489


Reviewed-By: Matthew Loring <mattloring@google.com>
Reviewed-By: Julien Gilli <jgilli@nodejs.org>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>