[pkg] add generic ZipFile Reader/Writer (#72237)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/72237
add a generic zip file reader/writer to torch.package in order to get rid of dependency on torch for non torchscript / tensor related usages of package. This also enables users to create a derived class from the zip file reader/writer classes to have their own serialization/deserialization if it's desired for performance needs.
https://www.internalfb.com/intern/diff/D35423079/ was reverted due to this refactor changing the name of where most of the implementation components of PackageExporter/PackageImporter come from like ModuleActionType_ etc.
This diff also changes the import paths where these components come from to point to the correct file compared to D35423079
Test Plan: Imported from OSS
Reviewed By: malfet
Differential Revision: D35423079
Pulled By: PaliC
fbshipit-source-id: 31abc4364d5fd007911cfb67cf36ebfac5d786f4
(cherry picked from commit 023b0d1445e0b1e1bb7a03c660cd62eb9d26d2a6)
