[Static runtime] Pass parent graph metadata to forked subgraphs (#79578)
Summary:
- Remove creation of new StaticModuleOptions for the forked subgraph. Use parent graph's options for creation of runtime for forked subtraph
- StaticRuntimeMetdata extends CustomClassHolder which can be casted to IValue and attached to IR node's attributes.
Differential Revision: D37159684
Pull Request resolved: https://github.com/pytorch/pytorch/pull/79578
Approved by: https://github.com/mikeiovine
