Support torch.equal for ShardedTensor. (#69734)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/69734
Added support for `torch.equal` to ShardedTensor. This is really
helpful in terms of comparing two ShardedTensors.
Will implement `allclose` in a follow PR.
ghstack-source-id: 145301451
Test Plan: waitforbuildbot
Reviewed By: fduwjj, wanchaol
Differential Revision: D33004315
fbshipit-source-id: 786fe26baf82e1bb4fecfdbfc9ad4b64e704877f
