src: deprecate AddPromiseHook()

This API was added to fill an use case that is served by `async_hooks`,
since that has `Promise` support.

Deprecate this, as the underlying `Isolate::SetPromiseHook()` may be
removed in its current form in the future.

Refs: https://docs.google.com/document/d/1g8OrG5lMIUhRn1zbkutgY83MiTSMx-0NHDs8Bf-nXxM/

PR-URL: nodejs#26529
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>

src/node.h

@@ -597,9 +597,10 @@ struct async_context {
 
 /* Registers an additional v8::PromiseHook wrapper. This API exists because V8
  * itself supports only a single PromiseHook. */
-NODE_EXTERN void AddPromiseHook(v8::Isolate* isolate,
-                                promise_hook_func fn,
-                                void* arg);
+NODE_DEPRECATED("Use async_hooks directly instead",
+                NODE_EXTERN void AddPromiseHook(v8::Isolate* isolate,
+                                                promise_hook_func fn,
+                                                void* arg));
 
 /* This is a lot like node::AtExit, except that the hooks added via this
  * function are run before the AtExit ones and will always be registered