Update base for Update on "[et] generate debug handle before opeartor decomposition"

This diff update the debug handle generation, from each node in the edge program having a individual debug handle, to all nodes having a same ancestor in export graph sharing a same debug handle, which update the start point of tracing our node transformation from edge graph to exported graph.

Differential Revision: [D76860368](https://our.internmc.facebook.com/intern/diff/D76860368/)

[ghstack-poisoned]

Author: Gasoonjia