[jit][edge] Do not reuse mobile type parser for all unpicklers. (#70338)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/70338
Today Unpickler is used by both server and mobile for deserializing model, and it always fallback to mobile parser when there's no type resolver provided by user. However this is not intended as server and mobile type parser supports different things. In this diff we provide a default fallback using script parser and opt it out for all mobile cases.
ghstack-source-id: 146727330
(Note: this ignores all push blocking failures!)
Test Plan: CI
Reviewed By: iseeyuan
Differential Revision: D33284352
fbshipit-source-id: 997c4f110b36eee6596e8f23f6a87bf91a4197ed
