deploy: add dummy metadata for builtin packages (#76211)
Summary:
This adds dummy metadata for frozen builtin packages when using `torch::deploy`. This is a bit hacky but unblocks allows Huggingface transformers library to be used within `torch::deploy` which depends on `importlib.metadata.version` to detect whether torch is installed or not.
https://github.com/huggingface/transformers/blob/main/src/transformers/utils/import_utils.py#L49
Pull Request resolved: https://github.com/pytorch/pytorch/pull/76211
Test Plan: Added `importlib.metadata.version("torch")` unit test
Reviewed By: kiukchung, PaliC
Differential Revision: D35834831
Pulled By: d4l3k
fbshipit-source-id: e58365e1ada69299adea96f0ca1fe211e092dd97
(cherry picked from commit c4b4152a24dcdf359503db2112a10a88633e67b6)
