cherry-pick: Add required deps to pyproject.toml (#3117)

Summary:
Cherry-pick 28f1c8cb54cbd0faa2e80660d809d53edb014dcc from release/0.2 into main

These pip dependencies need to be present to build the pip wheel.

Also, change the version to a stub that looks less like a real version,
until we can hook up the logic to get the version from the git repo
state.

Pull Request resolved: https://github.com/pytorch/executorch/pull/3117

Test Plan: Ran `./install_requirements.sh` in a new conda environment on my mac M1, and it built/installed the pip package successfully.

Reviewed By: tugsbayasgalan

Differential Revision: D56282487

Pulled By: dbort

fbshipit-source-id: 81e575957ca4d1262eecb4dd5b480a88942371f6