[sharded_tensor] add readonly tensor properties (#63679)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/63679
This PR add read only tensor properties to sharded tensor, to match the torch.Tensor behaviors.
Test Plan: test_sharded_tensor_metadata
Reviewed By: pritamdamania87
Differential Revision: D30459343
fbshipit-source-id: 9aec8ecfe76479eed25f3b843495e5719ed2956d
