[dtensor][debug] force visualize_sharding not to print for empty tensors (#121217)
**Summary**
Current `visualize_sharding` code cannot print for empty DTensor objects which leads to an exception. This PR skips the print logic if the DTensor passed in has 0 element.
<img width="2165" alt="Pasted Graphic" src="https://github.com/pytorch/pytorch/assets/12968408/fa40b5e7-dad7-4d3a-a485-6a18067320ff">
Pull Request resolved: https://github.com/pytorch/pytorch/pull/121217
Approved by: https://github.com/wanchaol
ghstack dependencies: #121385, #121382
