[Static Runtime] Introduce StaticNodeInfo to store ProcessedNode's data independent from runtime instances (#73536)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/73536
Currently `StaticNodeInfo` class assumes 2 distinct roles that are not too obvious:
1) "template" that contains metadata of an actual executable node by runtime. owned by `StaticModule`
2) fully instanced ones that are owned by `StaticRuntime`.
We currently merge these two usecases into one class, that can be error-prone in case illegal copying happens uncontrollably. Currently, we only copy objects of kind (1) into objects of kind (2) when a `StaticRuntime` instance is created.
To address ths issue, this change introduces `StaticNodeInfo`, a separate class, to distinguishes the aforementioned two usecases in the code more clearly. With this `StaticNodeInfo` is for (1) and `ProcessedNode` is now for (2).
Test Plan: Existing tests
Reviewed By: mikeiovine
Differential Revision: D33985600
fbshipit-source-id: 0c79cea2bf982dd956a35f48eaf6027e5b6e390c
(cherry picked from commit 0d8acc4a2b6eeb3e4af3ad2c99f4cd667680f8df)
