[package] make importer a little more obscure (#51676)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/51676
We offer the ability to access the importer from within packaged modules by doing
`import resources`. This behavior is nice (and more powerful than the
importlib resources API), but I think `resources` is too common a name
(pip has a package for it)
Change to `import torch_package_importer` but open to bikeshedding
Test Plan: Imported from OSS
Reviewed By: jamesr66a
Differential Revision: D26620314
Pulled By: suo
fbshipit-source-id: 0942c99f02c0f55f5f3a1b2566961018b796bdd4
